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1. Handle Front Inner Bezel Located under top Rear Housing Top Rear i Housing Bottom Rear Housing lol Basics Right Side View 54 Right Side View Top Rear Housing Front Outer Bezel Handle 0 Ports are accessed by opening the 10 door Internal Locator 55 lol Basics Internal Locator Analog Board Power Supply Logie Board i Interconnect g 4 Board Hard Drive E gt Day CD ROM Drive fa Basics iMac Logic Board 56 iMac Logic Board Processor Card CUDA Modem Reset Button Connector o Power Filter i Modem Connector U lt gt Ethernet SGRAM 00 Slot 01 e Graphics lt 4 Speakers Chip Microphone Product ID Label J6 IrDA secccccece Connector OJ Battery J15 J16 J17 J13 J14 HD Power Video Hard Drive CD ROM Audio Connector Connector Connector Connector Connector Connector on underside of Logic Board I O Panel 57 T O Panel Sound In Type A Ports eure out Ethernet E Basics I O Panel 58 Repair Strategy Warranty Strategy and Ordering 59 Strategy and Ordering The iMac computer is to be serviced through module exchange and parts replacement Apple Computer offers standard carry in service only on the iMac computers with the exception of US customers who purchase the AppleCare Service Plan covere
2. P508 Analog p514 Board P1 Power Headphone P2 Board Audio Cable 5 connectors P304 P305 P306 P302 P303 CRT P502 P506 P505 Power Cable Processor Board Logic Board K Modem eee On Off gt oe ers Keyboard 2 amp 1 HS lie IrDA Ribbon Cable SS A 14400 CD HD Data Cable with Ferrite Bead A V Interconnect Board IrDA Bd lol Troubleshooting General Power Flow 3 Power Flow Power is controlled in the iMac system by the power supply board Once the unit is plugged in power flows from the AC outlet at the wall to the AC inlet on the power supply board From there the power flows through the power filter board and on to the analog video board the logic board and all its attached components Click here to view an animation of how power flows through the iMac Power Supply Board Fuse There is a fuse on the AC line on the power supply board at F901 that can be replaced if the computer has no power Refer to the No Power symptom for a full troubleshooting scenario Before replacing the fuse you should do a continuity test with an ohm meter If the ohm meter registers 0 the fuse is good If the meter registers infinite the fuse should be replaced Refer to Testing for Power later in this chapter for instructions on how to check the power supply board fuse Refer to Logic Board in the Take Apart chapter to locate the fuse on th
3. 33 Testing for Power on the Version 2 Power Supply Board ol Troubleshooting General Testing for Power 9 At the Power Supply Board Fuse First remove the top access cover and then remove the CRT EMI shield to access the power supply board warning You must unplug the iMac to test do a continuity test at the power supply board fuse Note You will need an ohm meter do a continuity test on the power supply board fuse Refer to the picture on the next page to locate the necessary test point referenced in the following procedure Unplug the computer to take this reading Using an ohm meter touch the red and black probes to the two metal points at location F901 and check for continuity reading of 0 Any other reading than 0 indicates a bad fuse which should be replaced The figure on the following page shows how to take the reading Power Supply Connector Testing the Power Supply Board Fuse lol Troubleshooting General The Cuda Chip 10 The Cuda Chip The Cuda is a microcontroller chip Its function is to e Turn system power on and off e Manage system resets from various commands Maintain parameter RAM PRAM e Manage the real time clock Many system problems can be resolved by resetting the Cuda chip see the Symptom Cure tables for examples Press the Cuda reset button on the logic board to reset the Cuda chip The Cuda reset button is located on the back edge of the logic boa
4. Exploded View Wiring Diagram Ver 2 Analog Video 661 2166 and Ver 2 Power Supply 661 2167 Use this wiring diagram to verify cable connections and to identify visible differences from the original analog video and power supply boards The wiring diagram on the previous page shows the cable connections of the original analog video and power supply boards R Speaker P1 L Speaker 230 e O O O O P904 N P504 Flyback P702 Transformer To MLB BD e f H i CN1 P915 Je d oeo SS AC P902 Socket ly B r G ower Supply Board J Ver 2 661 2167 Fan D A Ver 2 661 3841 VIS Analog Board Ver 2 661 2166 Signal Cable Video Board Ver 2 661 2166 Service Source Additional Procedures iMac Resetting the CD ROM Eject Mechanism After manually ejecting CDs from the iMac CD ROM tray of both A and B models the eject mechanism sometimes does not reset into a position that allows the tray door to close properly Instead of replacing the CD ROM assembly the eject mechanism can b
5. Mac OS Info Center E Mac OS Help 1 Click a topic area Learning the Basics Sound Application Programs Monitors standard settings Look For Topics Index The Mac OS Info Center contains information about your computer and the Mac OS including troubleshooting information Pelee ON Ante ee Double click the Mac OS Info Center icon on the desktop to open the Info Center Click this button to see the online user s manual TIPS AND SITES FOR MAKING THE MOST OF YOUR COMPUTER 7 MacOS ac US Info Center You don t need an Internet connection to use the Info Center Click a picture below to get started Help Me Solve Gite Tell Me About the Mac OS Help Me re the Internet The Mac OS logo is and oth Click this button to see troubleshooting information and information on Apple s online support Web sites CHAP Problems Using Your Computer Problems With Applications Documents and Memory Message appears saying there s not enough memory There is not enough memory available to continue Use the Application menu to quit some applications then click Try Again If quitting applications does not help quit all applications and click Restart Cyaan All the memory in your Macintosh is in use by other application programs system software and system resources Quit other open programs to free memory then ope
6. Pull the CD ROM drawer out to access the micro screw on the underside of the CD ROM drive Remove the micro screw Note There are three tabs that hold the CD bezel in place you can t see them in this photo Refer to the graphic on the next page lol Take Apart CD ROM 41 Press the three tabs and gently remove the bezel from the CD ROM mechanism lol Take Apart Hard Drive 42 Hard Drive Before you begin remove the following Lower access cover e Logic board mass storage chassis Hard Disk Drive Hard Drive 43 Cece a u ee 8OOOO5 Remove the two screws securing the hard drive carrier to the chassis The CD ROM doesn t have to be removed completely to access the hard drive as shown in the photo Replacement Note Notice the spring resting on top of the hard drive The CD ROM carrier attaches to the spring making the CD ROM spring loaded in the chassis Hard Drive 44 lol Take Apart Hard Drive Hard Drive Carrier Holding on to the hard drive carrier push the carrier back to free the carrier from the chassis Note Pushing the carrier back releases two metal tabs on the underside of the hard drive carrier Refer to Hard Drive Carrier Replacement for photo and information Lift the hard drive carrier from the chassis Hard Drive 45 4 Remove the hard drive data cable power cable and four screws secu
7. This procedure replaces only your original software original system software factory settings and applications that came with your computer with new copies from the CD leaving everything else on your disk untouched Important Your preferences may be reset to their original factory defaults and if you ve already registered software this procedure may modify that data Start up your computer from the software restore CD and open the Apple Software Restore application For instructions see Chapter 3 Starting Up From a CD on page 45 Click the OK button on the introductory screen If necessary click Switch Disk to choose the disk on which you want to restore your software Click the checkbox next to Restore In Place Click Restore An onscreen message shows the status of the restore process Reinstalling Your Computer s Software 63 64 Chapter 5 oon o Click Quit when the process is complete Erasing Your Hard Disk This procedure completely erases the contents of your hard disk before restoring the original contents original system software factory settings and applications that came with your computer Start up your computer from the software restore CD and open the Apple Software Restore application For instructions see Chapter 3 Starting Up From a CD on page 45 Click the OK button on the introductory screen If necessary click Switch Disk to choose the disk on which you want to
8. e Use the ATI1 17 commands to check firmware versions and modem features Use ATZ to reset the modem back to its original configuration lol Troubleshooting Symptom Charts How to Use the Symptom Charts 17 No power System is completely dead No LED no fan no hard drive power and the screen is completely black Symptom Charts How to Use the Symptom Charts The Symptom Charts included in this chapter will help you diagnose specific symptoms related to the Power Macintosh G3 Macintosh Server G3 Blue and White product Because cures are listed on the charts in the order of most likely solution try the cures in the order presented Verify whether or not the product continues to exhibit the symptom If the symptom persists try the next cure Note If you have replaced a module reinstall the original module before you proceed to the next cure For additional assistance contact Apple Technical Support No Power 1 Refer to Testing for Power mentioned earlier in this chapter 2 Verify the power outlet is good Try a known good power cord to determine if the existing power cord could be the problem 3 Possible bad USB keyboard Verify the keyboard cable is connected properly to the computer Disconnect the keyboard and power on the system via the button on the front of the computer Do you have power to the system now Yes The keyboard is bad Replace the keyboard No Go to next step 4 Reset the CUDA chip a
9. in Additional Procedures Replace the CD ROM drive lol Troubleshooting Symptom Charts Hard Drive Problems 29 Hard Drive Problems Hard drive doesn t 1 Corrupted drivers Can you see the hard drive using Drive spin or the hard drive Setup 1 5 1 doesn t appear on the Yes Use Drive Setup 1 5 1 to reinstall the software drivers for the desktop hard drive If the problem persists use Drive Setup 1 5 1 to reinitialize the hard drive See TIL article 22206 for instructions Warning You will lose all data on the hard drive when you reinitialize it Backup the data first if possible No Go to next step 2 If you don t see the hard drive using Drive Setup Check all cable connections to and from the hard drive Replace the hard drive CD data cable Replace the hard drive Replace the hard drive power cable lol Troubleshooting Symptom Charts Sound Out Problems 30 Sound Out Problems No sound coming from the internal speakers external speakers connected via the I O panel to the speaker connector on the logic board or both 00 First disconnect any external microphones speakers or headphones Next verify that volume setting in Control Panel is adequate and that mute is not checked Test the for sound coming from the internal speakers Do you have sound now Yes If the initial sound out problem was with the internal speakers the problem is solved If you reconnect the external sound out devic
10. 25 System Hangs Freezes During Boot System begins a 1 normal startup process with a boot chime and normal display but then freezes before the Finder appears Boot with Extensions off by holding down the Shift key during startup See TIL article 14343 for more information on possible Extension conflicts Does the system startup successfully with Extensions off Yes Begin adding back the system Extensions one ata time and starting up the system after each addition If the system freezes again you know that the last Extension you added is causing the problem No Go to the next step Boot from the system CD that came with the unit Does the system startup successfully Yes Reinstall system software You must use the system software CD that came with the unit to get the correct version of Mac OS If the problem persists go to the next step No Reseat the SDRAM If the problem persists replace the SDRAM one DIMM at a time with known good SO DIMMs Bad USB device Turn off the computer and disconnect all USB devices Next power on the system using the power button on the front of the unit and begin adding back the USB device one at time beginning with the keyboard and then the mouse and so on If the system hangs only after you reconnect a particular USB device replace that USB device The hard drive or its software drivers are most likely the problem Can you see the hard drive using Drive Setup Yes Use Drive Set
11. If the sound signals originate at the internal microphone they travel along the long internal audio cable to connector J6 on the A V interconnect board The signal is then transmitted to connector J1 on the back side of the A V interconnect board travels via the short internal audio cable and finally arrives at connector J14 on the logic board If the sound signals originate at an external microphone they travel directly from the external microphone to the microphone sound in connector on the logic board Click here to see an animation of how the sound in signals travel through the iMac lol Troubleshooting General Sound Out Flow 14 Sound Out Flow The iMac has three sound out paths to the built in speakers to the sound output jack and to the headphone jacks To transmit sound out the internal speakers the sound signals must travel via the short internal audio cable from the J14 audio connector on the logic board to the J1 connector on the A V interconnect board From there the signals are transmitted to the J6 connector on the other side of the A V interconnect board And then the sound out signals travel via the long internal audio cable to the internal speakers Sound that is transmitted to the external speakers travels directly from the sound out connector on the logic board to the external speakers via their external cable hookup Click here to see an animation of how the sound out signals travel through the iM
12. See also individual control panels reinstalling after clean installation 59 replacing battery and 20 resetting PRAM and 19 resolving compatibility problems with 17 18 custom installation of system software 56 58 date incorrect 20 38 deleting files 28 desktop CD ROM icon doesn t appear on 30 31 hard disk icon missing from 10 normal desktop doesn t appear 10 rebuilding 27 38 devices troubleshooting 14 15 33 35 disk corruption message 10 15 Disk First Aid 47 48 67 Can t find it See also Mac OS Help s onscreen index Open the Help menu and choose Help then click the Index button 68 Index disks See CD ROM discs hard disk documents See also files deleting 28 DOS 28 missing 27 29 61 problems with 27 28 32 33 unlocking 28 62 Where have all my files gone document 29 Windows 28 DOS documents 28 DOS partitions 30 drivers updating hard disk drivers 49 61 USB devices and 34 Drive Setup program initializing hard disk with 49 50 testing hard disk with 50 51 updating hard disk drivers with 49 Easy Access control panel 38 ejecting CD ROM discs 30 32 46 electrical interference 39 empty flashing box 10 Energy Saver control panel 11 erasing hard disk 64 error messages See messages Ethernet network device problems and 14 extensions disabling 15 26 incompatible 17 18 not enough memory for 15 16 reinstalling after clean installation 59 testing 18 virtual memory and 15 Extensi
13. Service Source iMac Service Source Hot Issues iMac lt u gt Introduction 1 Introduction This chapter is designed to highlight unique or high priority product issues that you should be aware of before servicing the iMac computer This chapter alerts you to important issues and provides pointers to other areas in the manual where more complete information can be found This chapter is not intended to replace other parts of this manual it merely provides a pointer to pertinent information in those chapters To familiarize yourself with a new product family always read the Basics chapter in its entirety You should also refer to the Troubleshooting chapter for basic theory of operations information lt u gt Mixed Memory Types 2 Mixed Memory Types The iMac computer uses SDRAM SO DIMMs only EDO memory will not work in the iMac computer System problems will result if EDO memory is installed See SDRAM DIMMs in the Basics chapter and refer to the iMac section of the Memory Guide Note Customers are allowed to upgrade the memory in iMac computers and may inadvertently mix EDO and SDRAM memory If incompatible memory types are installed you will hear two beeps upon startup See Power On Self Test in Troubleshooting for more information lt u gt Mixed Memory Types 3 SGRAM Video Memory The iMac computers use SGRAM video memory Use only SGRAM SO DIMMs in these ma
14. discharge the CRT and review CRT safety in Bulletins Safety Fan 50 1 Remove the two screws from the fan bracket Screws Fan 51 Fan Cable 2 Disconnect the fan cable from the analog board Note The fan cable may be tie wrapped to the chassis 3 Remove the fan from unit Replacement Note Due to space constraints the analog board will have to be removed to reconnect the fan at P508 on the analog board Also install the fan so that the cable rests in the cut out notch on the chassis lol Take Apart Audio Video Interconnect Board 52 Audio Video Interconnect Board Audio fy ideo Interconnect Board Before you begin remove the following Lower access cover e Logic board mass storage chassis Logic board I O panel e CD ROM e Hard Drive fa Take Apart Audio Video Interconnect Board 53 Audiovideo Interconnect Board 1 Remove the silver screw from the EMI shield on the audio video interconnect board Note There are two versions of the audio video interconnect board 922 3589 with an IrDA connector and 922 3741 without an IrDA connector The A and B iMacs use the 992 3589 with IrDA The five colored iMacs do not use the IrDA technology These sytems use the 922 3741 board without IrDA Take Apart Audio Video Interconnect Board 54 2 Remove the two thumbscrews with a nut driver and the one phillips screw from the out
15. located at F901 near the bottom right corner of the installed power supply board as you are facing the back side of the board Before Power Supply Board 104 replacing the power supply board test the fuse Refer to the Testing for Power in the iMac Troubleshooting chapter for instructions on how to check the power supply board fuse This fuse is an orderable service part and can be replaced by service providers lol Take Apart Power Supply Board Ver 2 105 Power Supply Board Ver 2 Awarning This product contains high voltage and a high vacuum picture tube To prevent serious injury review CRT safety in Bulletins Safety Note There are two versions of the power supply board Identify which version you have before replacing a module and exchange them like for like Refer to the Service Parts database or the wiring fa Take Apart Power Supply Board Ver 2 106 diagrams for the Ver 2 analog video and power supply boards located in the Exploded View Chapter The Rev 2 power supply board is not backwards compatible and must be used with the other Ver 2 service parts lol Take Apart Power Supply Board Ver 2 107 Before you begin discharge the CRT and remove the following Lower access cover Main logic mass storage chassis Bottom rear housing Front lower panel e Front outer bezel Rear top housing EMI shield lol Take Apart Po
16. t solve the problem go on to the next step Unplug and then re plug the mouse into the USB port If you find that unplugging and re plugging the mouse into the USB port restores functionality of the mouse it s possible that the mouse is broken and may need to be replaced Contact Apple for assistance in getting the USB mouse replaced USB Printer Problems Does the unit have the iMac Update 1 0 Ways to tell Run Apple System Profiler In the Device screen the USB version number in the upper left corner should be greater than 1 0 Do a Get Info on the OS ROM file in the system folder Under the name it should be iMac Update 1 0 or greater lol Troubleshooting Symptom Charts Networked Printer Problems 36 Note The iMac Update 1 0 improves the customer experience with many USB peripherals Apple recommends every iMac customer install this update The iMac Update 1 0 software is available at no charge through Apple s Software Update Web site http www apple com swupdates Refer to TIL 44005 for additional information An iMac cannot print to an attached known good networked printer 2 Verify with the manufacturer of the printer that it is iMac compatible Open the Chooser and verify that you have the correct printer and printer driver selected Use Apple System Profiler to see if it recognizes that a USB printer is connected Yes Reinstall the printer driver No The printer or its cable is malfunctioning
17. the screen has frozen If you need to do something else instead try simultaneously pressing the Command 88 key and the period key to cancel the task the computer is working on There may be a temporary software problem that can be fixed by restarting your computer See Restart the computer on page 12 If the problem recurs it may involve one or more of your application programs See the next entry for additional suggestions Software quits unexpectedly The application unknown has unexpectedly quit because an error of type 1 occurred The application program needs more memory or there is a software problem a Write down what you were doing when the message appeared and write down the text of the message This information may help a technical support representative diagnose your problem if you later need to contact Apple or the manufacturer of the application program About the codes in error messages The number codes in error messages are used in software development Sometimes they can help a technician narrow down the source of a problem Restart your Macintosh See Restart the computer on page 12 Most software problems are temporary and restarting the computer usually corrects the problem m Check for multiple System Folders on your startup disk using the Find File command If you have more than one System Folder throw away the current System Folder The System Folder that your compute
18. 2076 CD ROM drive If you are replacing a 24x CD ROM drive in a five color iMac 266MHz or greater order 661 2207 CD ROM drive 24X Ver 2 Refer to the Service Parts database for additional information lt u gt Service Source Basics iMac lol Basics Overview lol Basics Product Description 2 Product Description The iMac is an all in one product with a unique industrial design that is targeted specifically for the consumer and education market Standard Configurations 3 Standard Configurations PowerPC G3 microprocessor running at 233 266 or 333 MHz System bus speed at 66 MHz Backside cache of 512K 32 MB SDRAM SO DIMM standard expandable to 256 MB total using 144 pin 100 MHz or faster SO DIMM modules 6 MB SGRAM standard Built in 15 CRT 13 8 viewable area 4 GB on 233 MHz or 6 GB hard drive on the 266 MHz and 333 MHz 24x speed ATAPI CD ROM drive 56K hardware modem Two Universal Serial Bus USB Type A ports supporting USB devices One RJ 11 modem port Standard Configurations 4 One 10 100 BaseT Ethernet RJ 45 connector for connection to 10 mb s or 100 mb s networks Two internal ATA connectors one supports the hard disk drive and one supports the CD ROM drive Two 3 5 millimeter mm headphone jacks One 3 5 mm sound output port for stereo sound output One 3 5 mm sound input port for stereo sound input The sound input port supports the Apple P
19. 53 Color icons for individual images don t appear Your computer may be low on memory To view color icons restart your computer and then reopen the Photos folder See Mac OS Help choose Help from the Finder s Help menu Image is scrambled colors are displayed incorrectly or no image appears a The program you are using may not be designed to work with large high resolution image files You can open the image with another program or you can assign more memory to the program See Mac OS Help choose Help from the Finder s Help menu System freezes or bomb message appears m Restart your Macintosh If you need help restarting your computer see Chapter 1 Problems Starting Up The program you are using may not be designed to work with large high resolution image files You can open the image with another program or you can assign more memory to the current program See Mac OS Help choose Help from the Finder s Help menu Problems Playing Audio CDs See Problems With Sound and Video on page 41 Problems With USB Devices Message appears saying the device can t operate because it needs more power than is available a Ifthe device has a power cord make sure the cord is plugged into a working electrical outlet m Plug the USB cable from the USB device into a USB port on your computer or another USB device that is plugged into a power outlet Problems Using Your Computer 33 34 Chapte
20. 66 3 Lift speaker up and out of the chassis frame Note The speakers are keyed left and right Replacement Note Make sure the speaker cable is repositioned through the chassis hole if you removed or replaced internal chassis cables the internal CRT chassis frame or replaced the CRT Speaker Cable lol Take Apart IrDA Board 67 IrDA Cable IrDA Board IrDA Board Before you begin remove the following Lower access cover e Logic board mass storage chassis Bottom rear housing IrDA Board 68 lol Take Apart Cabla Vo IrDA ft Bracket And Seraw Scraw IrDA Board Remove the screw on the IrDA bracket remove the bracket Remove IrDA cable from the IrDA board Remove the screw attaching the IrDA board to the chassis Lift the IrDA board up and out of the inner bezel o Take Apart Headphone Power Board 69 Headphone Power Board Before you begin remove the following e Lower access cover Main logic mass storage chassis Bottom rear housing e Front lower panel Headphone Power Board o Take Apart Headphone Power Board 70 1 Disconnect the two cables three wire LED cable and multi colored audio cable from the headphone power board 2 Remove the two screws 3 Liftthe headphone power board from chassis frame Note You may have to wiggle the board a bit and assist from undernea
21. 922 3626 076 074859 3585 Power See amp Losi Lower Front Headphone N re Saeed Panel Board D ass Storage Chassis 3564 gi Exploded Bottom Rear Housing 922 3578 USB Keyboard y Lower Access Cover oot with I O Door 922 3573 ceea af gt USB Mouse Clips Kit 922 3572 922 3560 076 0743 Exploded View 3 Logic Board Mass Storage Chassis Exploded View CD Hard Drive Data Cable CD ROM Drive 661 2076 Heatsink Kit Note the bezel is a separate part 076 0752 SDRAM SO DIMM i J 661 2079 32 MB 5 64MB i 02 7 Hard Drive CPU Power Cable Shield Kit Le Bezel CD 922 3593 076 0753 Processor Card i 661 2201 333 MHz refer to Colored Service 661 2165 266 MHz Parts Matrix Exploded View f 661 2193 233MHz Rev 3 yo 4 661 2112 233 MHz Rev 2 SDRAM 661 2077 233 MHz _ 4486 replaced by 661 2193 ae 661 2023 Release Logic Board 661 2061 661 2113 Ver 2 Spring Attaches to Hard Drive Carrier Hard Drive 661 2133 4GB Carrier 2 Modem 661 2085 Logic Board Mass Storage ee Chassis 922 3586 Modem Standoff 922 3620 Screwlocks 922 3617 Audio Video Interconnect IrDA Cable oem 1 O Panel 922 3592 eine 076 0746 Audio Cable w o IrDA 922 3741 22 922 3590 Video Cable 922 3591 Power Filter Board 922 3574 o Exploded View 4 Colored Se
22. Access Cover 4 Lower Access Cover Position the computer face down resting the CRT on an ESD mat or other soft surface k la E ky Lower Access Cover 5 1 Loosen captive screw on access cover Note The captive screw is not included when ordering the lower access cover To order a captive screw order part number 922 3630 lol Take Apart Lower Access Cover 6 Handle Lower ACCESS Cover 2 Using the handle quickly jerk the lower access cover up and towards you Note The cover is difficult to remove An abrupt tug upward is required to remove the cover Take Apart Lower Access Cover 7 Replacing the Lower Access Cover 1 Align the bottom of the lower access cover inside the bottom housing plastics 2 Align the tabs one on each side on the access cover with the holes on the housing Lower Access Cover lol Take Apart Logic Board Mass Storage Chassis 8 Logic Board Mass Storage Chassis Before you begin e Position the computer face down resting the display on an ESD mat Remove the lower access cover Logie Board Mass Storage Chassis lol Take Apart Logic Board Mass Storage Chassis 9 1 Remove the two screws vie i m T at the top of the logic n aE e board mass storage a chassis j 2 Disconnect the screw clamp and the audio RGB main power and IrDA cables Screw Audio FGE IrDA Cable Clamp Ca
23. Multiplier Flate Lens 200 1000 fe 20 250 fe 10 50 fe Adjustment Tools 2 Light Meter Setup This topic covers setup for three light meter models R77 L 248 and 246 Model R77 Apple part number 076 0310 is the newest model available Model R77 The R77 light meter is capable of reading luminance from 10 to 1 000 footcandles fc Before you begin remove the 10X multiplier plate from the lens lol Adjustments Adjustment Tools 3 200 1000 fe 30 250 fc 10 50 fe Three scales are shown on the light meter e 200 1000 fc 50 250 fc e 10 50 fcT Because display screen luminance typically ranges from 10 to 50 fc take readings from the bottom scale only ia Adjustments Adjustment Tools 4 To measure a display screen s luminance 1 Set the scale switch to the bottom position to set up the 10 50 fc scale 2 Place the lens against the middle of the screen and read the bottom scale Scale Switch at Bottom Note When the light meter is not in use slide the scale 2 4 eee w 19 9 switch to its top position and store the meter in its protective case cere ee FOOTCANDLES COLON AND TSn CORRECTED 00 ETET LAS ATE 00000 o Adjustments Manufacturing Date Stamp Adjustment Tools 5 Important If you suspect the light meter is giving false readings verify the readings with a known good light meter or photometer Also
24. Replace the cable or printer If the printer is connected to a third party hub switch it to one of the iMac ports in the I O panel Does the printer work now Yes You have a bad third party hub Replace the device that contains the problem USB port or refer to the third party documentation for troubleshooting procedures No Go to next step If the printer is already connected to a USB port on the iMac switch it to the other USB port Does the printer work now Yes Replace the logic board No Go to next step Perform a clean install of the system software using the Mac OS 8 1 CD that shipped with the iMac You must use the system software CD that came with the iMac in order to get the correct version of Mac OS Replace the printer interface cable Replace the logic board Networked Printer Problems Check the network connections Verify that you have the correct version of Mac OS 8 1 with the appropriate iMac enablers installed If you are unsure reinstall the system software using the original CD that shipped with the iMac unit Open the Chooser and verify that you have the correct printer and printer driver selected Perform a clean install of the system software you must use the system software CD that came with the iMac in order to get the correct version of Mac OS 8 1 with the appropriate lol Troubleshooting Symptom Charts Networked Printer Problems 37 iMac enablers and or the network and printer software 5 Refer to
25. Vibration for additional information 1 2 NO A Try using a known good compact disc If the CD ROM drive fails to mount boot off the system CD that came with the unit Do you see the CD ROM drive on the desktop now Yes Reinstall system software You must use the system software CD that came with the unit to get the correct version of Mac OS 8 1 with the appropriate iMac enablers No Go to next step Check all cables running to and from the CD ROM drive at both ends and make sure they are attached securely Clean the CD ROM drive lens Replace the CD ROM drive Replace the hard drive CD data cable Replace the logic board CD ROM Vibration Try using a known good compact disc The iMac CD ROM update v 10 has been posted to Apple SW Updates web page The CD Firmware Update reduces the amount of vibration caused by certain CDs in the internal CD ROM drive The iMac CD Firmware Update application places new firmware on the CD ROM drive to reduce the amount of disc vibration lol Troubleshooting Symptom Charts CD ROM Door Not Latching Closed 28 CD ROM Door Not Latching Closed After manually ejecting CDs from the CD ROM tray of both A and B models the eject mechanism sometimes does not reset into a position that allows the tray door to close properly 1 2 Try using a known good compact disc Reset the eject mechanism with a paperclip to correct the problem Refer to Resetting CD ROM Eject Mechanism
26. bezel Top rear housing e CRT EMI shield Analog video board Power supply board CRT Speakers Headphone power board IrDA board CRT Frame 123 lol Take Apart Screws Remove the four brass colored screws to separate the top frame from the bottom frame R Note Take note of the cable routing before removing replacing any cables lol Take Apart CRT Frame 124 Pull the tabs out of the catches on the CRT frame Lift the top frame up and off the bottom frame lol Take Apart CRT Frame 125 f 4 The remaining frame is RGB Video Cabl Audio Cabl LED Cabl eye a the CRT bottom frame It ships without the cables and rubber plugs Note The cables and rubber plugs are offered separately CRT Bottom Frame Supply Cable lol Take Apart Installing a Microphone Gasket 126 Microphone Gasket Installing a Microphone Gasket Installing the microphone gasket 922 3679 will improve audio recording quality from the internal microphone on some early production iMac computers Refer to TIL article 58053 for additional information Remove the following Front lower panel e Front outer bezel lol Take Apart Installing a Microphone Gasket 127 1 Place the gasket around the microphone opening in a vertical orientation Ensure that the microphone opening is not obstructed by the gasket Microphone Gasket lol Take Apar
27. center 8 incorrect appearance of 38 missing from windows 10 initializing hard disk 49 50 installing system software 53 64 Install Mac OS 8 1 alias 54 ISO 9660 CD ROM discs 32 33 K keyboard See also USB devices doesn t work 9 resetting PRAM and 19 startup problems and 13 troubleshooting USB devices and 14 35 Keyboard control panel 37 keyboard shortcuts canceling current operation 24 forcing application to quit 13 forcing computer to restart 12 quitting application 13 29 rebuilding desktop 27 38 resetting PRAM 19 restarting computer 12 L Launcher 29 locked files 28 62 M Mac OS Extended format 50 Mac OS Help 22 Mac OS Info Center 22 Mac OS partitions 30 Mac OS system software See system software memory disk corruption message and 10 15 incorrectly installed 20 increasing for system software 15 16 Not enough memory message 9 23 24 61 problems with 23 29 QuickDraw 3D and 42 43 RAM disk 15 24 resetting PRAM 19 restarting computer to clear memory 12 virtual memory 15 24 36 38 Memory control panel increasing memory for system software 15 insufficient memory and 24 performance and 36 37 38 menu bar blinking icon in 38 messages bomb message 33 disk corruption message 10 15 during system software installation 61 62 messages about hard disk 62 messages while printing 35 36 Not enough memory message 9 23 24 number codes in 25 QuickDraw 3D could not be found message 27 28 42 43 Thi
28. connection to the interconnect board is not firmly seated pushing on the CD ROM drive can move the video cable enough to cause an intermittent connection Reseat the internal RGB cable at J5 on the A V interconnect board and at P301 on the analog video board Replace the analog video board Exhange like for like there are two versions of this board Replace the internal RGB cable that runs between J5 on the A V interconnect board and at P301 on the analog video board Boot off the system CD that came with the unit Do you see a normal screen display now Yes Reinstall system software You must use the system software CD that came with the unit to get the correct version of Mac OS with the appropriate iMac enablers No Go to next step Remove any VRAM DIMMs and restart the unit Does the screen display appear normal now Yes Replace the existing VRAM DIMMs with known good VRAM DIMMs No Go to next step Replace the logic board lol Troubleshooting Symptom Charts Error Beeps 22 If you hear from one to five error beeps at startup with no boot chime you have a hardware problem Error Beeps 1 Do you hear one error beep at startup Yes Follow these steps to resolve the problem Reseat the SDRAM and try again If no SDRAM is present install a known good SDRAM SO DIMM in the top slot and try again If DRAM is present replace it one DIMM at a time starting with the top DIMM slot with a known good SDRAM SO DI
29. host computer on the fly without having to hassle with Shutting down restarting the computer Opening the computer case Installing a card ID conflicts Termination issues Loading device drivers although some devices may require a one time driver installation addition USB provides the user with A tiered star hub network topology see diagram later in this section allowing for the connection of up to 127 devices per host computer Two simple standardized plugs for the broad range of devices Power for some devices directly through the USB cable Two data speeds for devices 1 5 and 12 megabits per New Technologies 15 second Mbps Automatic adjustment of bandwidth allocation among devices New Technologies 16 USB devices use two types of plugs Type A and Type B Figure 1 USB Plug Types New Technologies 17 The Type A plug pictured on the left connects to the host computer or an upstream hub The Type B plug pictured on the right connects downstream to the USB device Some devices such as mouse devices have a Type B plug built into the device Note Upstream means moving up the device chain in the direction of the host computer Downstream means moving down the device chain away from the host computer Figure 2 on the next page illustrates this concept High speed connections 12 Mbps use shielded cabling to reduce interference at higher connection rates wh
30. injury review CRT safety in Bulletins Safety 1 Remove the eight screws attaching the inner CRT bezel frame to the inner plastic bezel There are four screws on each side 2 Disconnect the microphone cable lol Take Apart Front Inner Bezel 76 3 Lift the CRT bezel frame away from the inner bezel CET Bezel Frame ol Take Apart Front Inner Bezel 77 4 Lift the CRT off the front inner bezel 5 The inner bezel and microphone remain Remove the microphone from the front inner bezel lol Take Apart Top Rear Housing 78 Top Rear Housing Top Rear Housing Before you begin remove the following e Front lower panel e Front outer bezel e Lower access cover lol Take Apart Top Rear Housing 79 1 Remove the the eight bottom housing screws Fine Thread Screws Coarse Thread Screws Coarse Thread Screw Behind Door Fine Thread NE Screws lol Take Apart Top Rear Housing 80 Bottom Housing Press down on the tab and pull the bottom housing off the computer lo Take Apart Top Rear Housing 81 3 With a jeweler s screwdriver pry off the Serew Plugs two screw plugs on the top housing Note The screw plugs are keyed right and left 4 Remove the two silver screws under the screw plugs lol Take Apart Top Rear Housing 82 Top Rear Housing Note There are tab holes on both sides of the fro
31. near the tab latches and pull to release The I O door can be tricky to remove Don t hesitate to pull hard on the I O door to unhook the tab latches Note There are two versions of the iMac I O door Refer to the Service Parts database for more information al o Take Apart z r a 1 0 Door STSCI oh vinni F Serial i Murmber Label I O Door 120 Serial Number and Ethernet Address The serial number and Ethernet hardware address are located on the inside panel of the I O door Replacement logic boards ship with an Ethernet label If you replace the logic board you must affix the new label over the existing Ethernet label located on the I O panel above the serial number IMPORTANT Do NOT cover up the serial number information that is printed on the existing label lol Take Apart CRT Frame 121 CRT Frame The CRT frame consists of two separate parts the CRT bottom frame and the CRT bezel frame top piece All the cables shown are offered separately except for the degaussing cable which is not offered as a service part Note There are two versions of the CRT bottom frame 922 3627 and 922 3837 Ver 2 They are not interchangeable lol Take Apart CRT Frame 122 Before you begin discharge the CRT and remove the following e Lower access cover Main logic board mass storage chassis Bottom rear housing e Front lower panel e Front outer
32. playing audio CDs when they are inserted To turn off this feature use the QuickTime Settings control panel to change the automatic play setting Sound comes out of computer s speakers even though headphones are plugged in Plug your headphones into one of the headphone jacks 4 on the front of the computer Sound in headphones is odd Your computer has srs C 3D Surround Sound which doesn t work well through headphones To turn it off open the Monitors amp Sound control panel and click the Sound icon Click to remove the X from the Enabled checkbox Can t record from audio CD m Check your computer s sound input port to see if a microphone or other device is connected You may need to reset the sound options in the Monitors amp Sound control panel See the information on sound in Mac OS Help choose Help from the Finder s Help menu Can t record with microphone If you re using your monitor s built in microphone to record use the Monitors amp Sound control panel to mute the monitor s speakers In the same control panel make sure that the sound input is set to the monitor s built in microphone a f you re using an external microphone plugged into your computer make sure your sound input source is set to External Microphone Open the Monitors amp Sound control panel click the Sound icon and choose External Microphone from the Sound Input pop up menu See the information about sound in Mac
33. restore your software Click the checkbox next to Erase your hard disk before restoring If necessary change the disk format you want from the Volume Format pop up menu The recommended option is Same as selected configuration because it restores your hard disk to the Mac OS Extended format This format provides more efficient storage especially on large disks Click Restore Click OK An onscreen message shows the status of the erase and restore process Click Quit when the process is complete CHAP Contacting Apple for Help If this handbook has not helped you solve your computer s problem try getting information from Apple s product support site on the World Wide Web See the next section Obtaining Information via the World Wide Web If you can t find answers on the support Web site or don t have access to the Web contact Apple for assistance For information on how to contact the Apple Assistance Center see the service and support card that came with your computer Before you contact Apple see the section Have This Information Available Before Calling Obtaining Information via the World Wide Web Apple provides substantial information online for its customers If you have access to the World Wide Web WWW you may want to check the information in the support area before you call Apple Support information can be found at the following Uniform Resource Locator URL www apple com su
34. software 53 64 removing system software 57 repairing hard disk 47 48 61 Reset hole forcing restart with 12 resetting PRAM 19 restarting computer forced restart 12 keyboard shortcut for 12 problems restarting computer 7 procedure for 12 restarting to solve problems 12 restoring all original software 63 64 right angle prompt appears 38 S screen 8 11 13 37 servers 41 shortcuts See keyboard shortcuts shutting down computer 8 12 13 sleep 11 software install CD problems starting up from 60 reinstalling system software with 53 62 starting up from 45 46 software restore CD erasing hard disk with 64 restoring all original sottware with 63 64 software updates 65 sound computer beeps 8 20 39 computer makes unusual sounds 7 38 39 problems with 41 43 Sound Source module 41 speakers 42 standard installation of system software 56 starting up computer from CD ROM disc 17 45 46 60 61 computer freezing during startup 9 computer starts up from wrong disk 11 16 17 disk corruption message appears during 10 problems starting up computer 7 22 60 unusual sound when starting up computer 7 Startup Disk control panel 46 50 System file 61 62 System Folder clean installation and 58 59 multiple System Folders 25 re blessing 16 system software memory problems 9 15 16 message about 9 not recognized by computer 16 reinstalling 53 64 removing 57 updates for 65 System suitcase file damaged 48 T TCP IP control panel 4
35. solve a persistent problem Choose the destination disk from the pop up menu and click Select The following dialog box appears Ja The selected destination disk already has Mac OS 8 1 installed Do you want to Reinstall Mac OS 8 1 Add or remove software features Cancel Reinstall Add Remove Proceed to the next section Selecting Which Software to Install Selecting Which Software to Install After selecting a disk you need to decide between a standard or a custom installation The standard installation installs all the software you need for your model of computer and is the best choice to solve system software problems A custom installation lets you add or remove specific system software components Note Keep in mind that the more components you install the more memory or RAM is used and the greater the potential for software conflicts Install only the items you expect to use Standard installation Click Reinstall Proceed to Standard Installation on page 56 Reinstalling Your Computer s Software 55 Custom installation Click Add Remove Proceed to Custom Installation on page 56 Standard Installation 1 Follow the instructions on your screen until you see the Install Software window Oo iMac Install Data B Install Software Click Start to install the Mac OS 8 1 basic system on Macintosh HD 82 1 Note Yo
36. the Network Problems troubleshooting table earlier in this chapter 6 Replace the logic board lol Troubleshooting Symptom Charts Modem Not Recognized 38 Modem Not Recognized The internal modem is 1 not recognized Needed extensions or CCL files are not installed or are corrupt Are the correct CCL and extension files installed Note You will need the iMac Modem Extension and the iMac internal modem CCL Yes The CCL or extension may be corrupt Reinstall the CCL and modem extension If the problem persists reinstall the system software and try again No Install the correct CCL and modem extension and try again Zap PRAM by holding down Option Command P and R keys The modem card is loose missing or bad Is the modem card installed Yes Reseat the modem card and try again If the problem persists replace the modem card No Install a modem card and try again Modem Dialing Problems No Dial Tone 1 The phone line is not connected Is the phone line connected securely to the computer and to the wall jack Yes Go to the next step No Reconnect the phone line at both ends and try again The phone line is dead Plug a phone into that line Do you get a dial tone Yes There does not appear to be a problem with the phone line Test the modem as explained in Testing the Modem earlier in this chapter No Report the dead phone line to the phone company Reseat the modem card If the problem persists r
37. the CRT the ground wire should be removed from the old CRT and placed on the replacement CRT Important When replacing the CRT or analog board be careful not to bump the factory set magnets located on the neck of the CRT Changing these settings may adversely affect the quality of the video and require you to replace the CRT Microphone 117 Microphone Microphone Before you begin remove the following e Front lower panel e Front outer bezel Lower access cover Bottom rear housing Top rear housing Awarning This product contains high voltage and a high vacuum picture tube To prevent serious injury discharge the CRT and review CRT safety in Bulletins Safety lol Take Apart Microphone 118 4 1 Disconnect the microphone connector kubber Flug 2 With a needlenose pliers lift up the rubber plug to access the microphone Rubber Microphone Eneipsuts 3 With needlenose pliers gently pull the microphone out of the rubber enclosure Microphone Cunderneath rubber plug Note The microphone does not ship with the rubber enclosure around the bad microphone Microphone Cable Ne Microphone Connector 1 0 Door 119 lol Take Apart Tab Latches i Bottom k i Housing 1 oy a k F hte 170 Door T O Door The I O door is on the rear bottom housing To remove the I O door hold the door
38. you begin remove the following Lower access cover Logic board mass storage chassis Front Lower Panel lol Take Apart Front Lower Panel 60 Fine Thread Screws Screw Behind Door ii a i Ag io ee Fine Thread Screws Remove the eight screws on the bottom housing Note Four screws are fine threaded screws that screw into metal the four other screws are coarse threaded screws that screw into plastic One screw is located inside the I O panel door Front Lower Panel 61 lol Take Apart Bottom Housing Press down on the tab at the top of the housing and pull the bottom housing toward you Note Be careful with the tabs see the next step lol Take Apart Front Lower Panel 62 3 Position the iMac on its side and gently release the front lower panel tabs from the tab slots To remove the front lower panel from the bottom housing continue with the procedures Front Lower Panel 63 lol Take Apart Front Lower Fane Push in on the front lower panel tabs to remove the front lower panel from the bottom housing Speakers 64 Speakers Before you begin remove the following Lower access cover e Logic board mass storage chassis Bottom rear housing Speakers o Take Apart Speakers 65 1 Remove the speaker screw 2 Disconnect the speaker cable Speaker Cable o Take Apart Speakers
39. you see a normal screen display now Yes Reinstall system software You must use the system software CD that came with the unit to get the correct version of Mac OS with the appropriate iMac enablers No Go to next step Reseat the internal RGB cable that attaches to the A V interconnect board at J5 Reset the CUDA chip and try again If the problem persists reset the logic board See The CUDA Chip and Restarting the Logic Board earlier in this chapter for instructions Verify that the following cables are attached securely Internal video cable that attaches to the logic board at J16 and the A V interconnect board at J2 Internal RGB cable that attaches at the A V interconnect board at J5 and the video board at P301 Replace the analog video board Exchange like for like there are two versions of the board Replace the internal video cable that attaches to the logic board at J16 and the A V interconnect board at J2 Replace the A V interconnect board Replace the logic board Replace the internal RGB cable that connects at the A V interconnect board at J5 and the video board at P301 Replace the CRT Replace like for like there are two versions of the CRT E Troubleshooting Symptom Charts Video Problems 20 Distorted video Screen geometry is out of adjustment or screen is out focus A a thin white horizontal line scrolls from top to bottom or bottom to top on the iMac display 1 Adjust the foc
40. 0 41 Tech Exchange 65 Tech Info Library 65 testing extensions and control panels 18 testing hard disk 50 51 3D accelerator 37 38 3D Surround Sound 42 troubleshooting See also specific problems Apple Assistance Center and 65 66 Apple support Web site 22 65 Apple System Profiler and 66 application programs 23 29 computer beeps 8 20 39 external devices 14 15 33 35 frozen system 8 9 12 13 24 hard disk 29 30 61 62 jammed CD ROM discs 17 30 keyboard 9 14 Mac OS Help and 22 Mac OS Info Center and 22 memory problems 9 20 23 29 61 mouse 9 13 14 34 printing problems 35 36 problems during system software installation 60 62 problems using computer 23 43 reinstalling system software and 53 64 screen 8 11 13 37 sound problems 41 43 startup problems 7 22 60 unusual sounds 7 38 39 USB devices 14 33 35 video problems 41 43 turning off computer 8 12 13 U unlocking files 28 62 USB devices 14 33 35 See also keyboard mouse v video problems 41 43 virtual memory 15 24 36 38 virus protection sottware 25 54 61 63 W X Y Z waking up computer 11 Web sites Apple 22 65 Where have all my files gone document 29 windows disappearing 29 no icons appear in 10 resetting window display 16 Windows documents 28 World Wide Web WWW Apple support information on 64 65 Mac OS Info Center and 22 Index 71
41. 2 MB SGRAM 32 bits Pixel depth 4 or 6 MB SGRAM 32 bits Video Display 43 Resolution 1024 x 768 Vertical rate 75 03 Hz Pixel depth 2 MB SGRAM 16 bits Pixel depth 4 or 6 MB SGRAM 32 bits Backside Cache 44 Backside Cache Backside cache is a significant architectural design change from earlier PowerPC processors The main advantage of the backside cache architecture is the speed of the dedicated CPU to L2 cache interface Using the dedicated bus allows the CPU to access the fast L2 cache storage through a high speed bus without addressing the slower system bus or competing with other devices attached to the system bus In comparison a far side cache running on the system bus would limit that SRAM interface to 50MHz The PowerPC G3 microprocessor interfaces with SRAM storage via a dedicated bus running at various multiples of the core PLL CPU speed With high speed L2 SRAM and a dedicated L2 bus the CPU can access stored information up to the speed of the processor clock L2 access is determined by the clock ratio setting For example with a 250 MHz Backside Cache 45 PowerPC G3 and a 2 5 L2 bus ratio the backside cache bus speed will be 100MHz twice the speed of the system bus Memory 46 Memory SDRAM DIMMs The iMac computer uses SDRAM in a SO DIMM slot that is smaller than the RAM slots for previous desktop Power Macintosh computers There are two SDRAM SO DIMM s
42. 24x Ver 2 lol Take Apart CD ROM 35 Push the CD ROM carrier inward to release the spring loaded carrier Lift the CD ROM drive out of the chassis Disconnect the CD ROM data cable and lift the CD ROM from the chassis Note The CD ROM drive carrier and interconnect board are one service part The bezel is a separate service part lol Take Apart CD ROM 36 Spring Catch Replacing the CD ROM Carrier 1 The spring catch on the back of the CD carrier has to hook on to the spring that rests on top of the hard drive Review the hard drive take apart procedure in this chapter to see a photograph of the spring lol Take Apart CD ROM 37 2 Ensure the metal tabs on the CD carrier feed into the tab holes on the chassis to secure the CD ROM drive in place CD ROM Tab Bezel Chassis lol Take Apart CD ROM 38 CD ROM Bezel Removing the CD ROM Bezel No primary steps are required before you begin this procedure Note The CD ROM bezel is a separate service part because the bezels come in different colors If replacing the CD ROM remove the bezel and place the bezel on the new CD ROM assembly Refer to the Service Parts Database for more information CD ROM 39 Open the CD ROM drive drawer by gently pushing a paper clip into the access hole CD ROM Bezel lol Take Apart CD ROM 40 Rest the iMac on its side
43. 5 The cursor moves on the screen but clicking the mouse has no effect or double clicking the mouse does not open an application disk or server The mouse occasionally loses its ability to track in one direction iMac cannot print to an attached known good USB printer Cursor Problems Reset parameter RAM Hold down lt Command gt lt Option gt lt P gt lt R gt during startup but before Welcome to Macintosh appears Boot off the system CD that came with the unit Does the cursor work now Yes Reinstall system software You must use the system software CD that came with the unit to get the correct version of Mac OS No Go to next step If the mouse is connected to the keyboard connect the mouse to one of the USB ports inside the iMac I O panel instead Does the cursor work now Yes Replace the keyboard No Replace the mouse If the mouse is already connected to one of the USB ports inside the iMac I O panel switch it to the other USB port Does the cursor work now Yes Replace the logic board No Go to next step Replace mouse Replace logic board Clean the mouse The USB mouse contains a ball that must remain clean in order to roll properly In addition there are several rollers inside your mouse which can accumulate debris If either the ball or the rollers are dirty the USB mouse may not track properly Refer to the Tech Info Library article 6491 How To Clean A Mouse If cleaning doesn
44. 63 Erasing Your Hard Disk 64 Contacting Apple forHelp 65 Obtaining Information via the World Wide Web 65 Have This Information Available Before Calling 66 Using the Apple System Profiler 66 Index 67 Contents 5 CHAP Problems Starting Up Problems Computer won t start up restart or shut down Computer won t start up Try these solutions m Make sure your computer is getting power p 13 a Force your computer to restart p 12 Increase the memory available for system software p 15 m Make sure memory is installed correctly p 20 m Replace the computer s backup battery p 20 Unusual sound occurs when you try to start up the computer Try these solutions a Make sure external devices are properly connected and turned on p 14 Make sure memory is installed correctly p 20 m Test and repair the hard disk directory p 21 Computer won t restart Try these solutions a Make sure your computer is getting power p 13 Quit open applications p 13 a Make sure you re using the correct disk as a startup disk p 16 m Resolve system extension conflicts p 17 m Force your computer to restart p 12 m Reset the PRAM p 19 8 Chapter 1 Computer won t shut down Try this solution Force your computer to shut down p 13 Single icon appears in middle of screen Icon with blinking question mark appears Try these solutions Make sure external devices
45. B DIMM existed that was smaller than 1 5 inches it would work in the lower expansion slot EDO SO DIMM RAM modules are not compatible with the iMac computers If a customer uses an EDO SO DIMM the unit will boot fine but will not show any RAM increase in the About this Computer window Note If EDO memory is mixed with SDRAM memory the computer will sound two beeps at startup See Power On Self Test in Troubleshooting for more information SGRAM Video Memory The iMac logic board comes with 2 MB of Synchronous Graphic RAM SGRAM video memory soldered on The logic Memory 49 board also contains a video memory expansion slot that accepts a Small Outline DIMM SO DIMM to increase video memory up to a maximum of 6 MB Apple supports a 4 MB SGRAM SO DIMM that is 32 bit wide 144 pin fast paged 83 MHz 12 ns cycle time or faster Important Use only SGRAM SO DIMMs Never use the 256K or 512K video memory DIMMs used in older Macintosh computers lol Basics Memory 50 Views lol Basics Front View 51 Front View Microphone 15 Inch Display Stereo We Steren Speaker i 0 ai Speaker Infrared CO ROM Headphone Jacks 2 Window Drive Power On Off Button Rear View 52 lol Basics Rear View Front Outer Bezel Handle Top Rear Housing Plug for Bottom Rear Power Cable Housing Left Side View 53 lol Basics Left Side View Front Quter Bezel
46. Command gt Option gt lt P gt lt R gt during startup but before Welcome to Macintosh appears Boot from the system CD that came with the unit Does the system startup successfully Yes Reinstall system software You must use the system software CD that came with the unit to get the correct version of Mac OS If the problem persists go to the next step No Go on to the next step Replace the Ethernet cable with a known good cable Try connecting to a different Ethernet port at the wall or external hub Are you able to switch to Ethernet and see Ethernet devices on the network now Yes The original Ethernet port is bad Contact your network administrator No Go to next step Are other users experiencing the same problem Yes There is a network wide problem Contact your network administrator No Replace the logic board lol Troubleshooting Symptom Charts CD ROM Not Showing on Desktop Can t Open Unable to see the CD on the desktop or to open a CD that is loaded into the drive CD ROM vibration is typically caused by unbalanced CDs when spinning at higher speeds in the internal CD ROM drive This vibration may cause the drive to have difficulty reading the CD CD ROM Not Showing on Desktop Can t Open CD Note A certain amount of CD ROM drive vibration is normal If the drive is vibrating loudly use the iMac CD Update v 10 to update the firmware on your CD ROM drive Refer to the following symptom CD ROM
47. Display Adjustment Utility and select Focus from the Pattern menu to display the focus test pattern lol Adjustments Cutoff 27 3 Using a flat head plastic adjustment tool adjust the focus control on the flyback transformer until the focus test pattern reaches the best center of screen performance Focus er ae in 4 Replace the covers and panels and return the computer to the customer mores i dl ee Rf te Service Source Exploded View iMac Exploded View 1 iMac Exploded View Top Rear Housing 922 3561 Shie peated Analog Video Board 661 2080 972 3610 661 2166 R RGB Video 2 Cable J 922 3622 Power Supply Board Outer Fro 922 3842 Rev 2 DeGauss ia Bees Bezel Microphone Power oe Ai qv 922 3563 922 3579 Supply soe Microphone Rubber Housing 922 3679 4 A Cable CRT Northern Hemisphere gt Ll Analog to i 922 3607 A PS P505 to 908 Inner 922 3840 Rev 2 Front Screw Covers et Bezel 0r POr 922 3882 Fan Bracket 922 3566 Fan 922 3841 Rev 2 w o Bracket e Bottom CRT EZ __ Frame A F 922 3837 Rev 2 A 922 3627 y LED Cable 4 922 3623 Audio Cable 922 3624 a 922 3836 Rev 2 Kit Board
48. FS based storage volumes If imperfections are found within a volume Disk First Aid can be used as a first step to repair the defects If a volume has suffered severe corruption other utility programs or repair methods may need to be used Stop Running Disk First Aid Click on the volume you would like to verify or repair Multiple volumes can be selected by holding down the Shift key while clicking on the volumes Select the Verify button to begin a verification process or the Repair button to verify and repair the selected volume s 4 Click Repair to begin testing and repairing the disk directory If Disk First Aid Cannot Correct the Problem m Make sure you started up from the software install CD See Chapter 3 Starting Up From a CD on page 45 m Try running Disk First Aid a second or third time Sometimes repeating the process corrects the problem m Use the Drive Setup utility typically located in the Utilities folder to update the driver m Use another disk repair or recovery program Sometimes another program will help you recover a corrupted disk Note Before using software from a manufacturer other than Apple see the documentation that came with the software or contact the software manufacturer to make sure the program is compatible with your computer and the version of Mac OS installed on your computer Apple cannot guarantee the performance of software from manufacturers other than Apple I
49. Ifyou use a RAM disk reduce its size or turn it off in the Memory control panel m Use the Extensions Manager control panel to turn off extensions you don t need You can use the Extensions Manager to create different sets of extensions for special situations You need to restart the computer for these changes to take effect See Mac OS Help available in the Help menu for more information about using virtual memory a RAM disk and the Extensions Manager If the problem persists try performing a clean installation of system software See Chapter 5 Reinstalling Your Computer s Software Problems Starting Up 15 16 Chapter 1 If none of these suggestions work install additional memory or RAM in your computer See the online documentation that came with your computer for instructions on how to do this If this doesn t solve your problem return to Problems on page 7 Reset the window display There may be a problem with the display of the windows Restart the computer and hold down the Option key until the desktop icons appear When the desktop appears all windows will be closed If this doesn t solve your problem return to Problems on page 7 Re bless the System Folder If your computer is not recognizing the system software the System Folder may need to be re blessed This helps the computer recognize which System Folder to use Start up your computer from the software install CD See C
50. MM No Go to next step 2 Incompatible RAM is installed Do you hear two error beeps at startup Yes Verify that only SDRAM SO DIMMs are installed and not EDO memory The iMac ships with SDRAM SO DIMM memory and is not compatible with EDO DIMMs No Go to next step 3 Bad RAM Do you hear three error beeps at startup Yes Replace the existing SDRAM one DIMM at a time starting with the top DIMM slot with known good SDRAM SO DIMMs No Go to next step 4 Bad ROM 5 Do you hear four or five error beeps at startup Yes Follow these steps to resolve the problem Reseat the processor module and try again Replace the processor module and try again Replace the logic board No If you do not hear any error beeps at startup refer to one of the other troubleshooting tables in this chapter lol Troubleshooting Symptom Charts Memory Error Dialog Box 23 An error dialog message appears pertaining to memory after you have a successful startup sequence A flashing question mark appears on the screen during startup Memory Error Dialog Box Run Mac TestPro to locate the bad SDRAM Replace the SDRAM with a known good SO DIMM Flashing Question Mark 1 Corrupted system software or software drivers Boot from the system CD that came with the unit Can you see the hard drive on the desktop Yes The system software is most likely the problem Reinstall system software You must use the system software CD tha
51. Mac OS Install application located on the software install CD lets you reinstall the Mac OS or specific components of the Mac OS on your computer This CD also includes a Read Me document that describes how to reinstall custom system software settings and application software that came with your computer Before Installing System Software Before you begin the installation do the following Customized preferences and settings If you have preferences or settings in control panels and individual applications make a note of them so you can easily reset them if necessary after you install system software Note If you are having problems with your computer you may not be able to open any files with preferences or customized settings 53 54 Chapter 5 Software that runs in the background Ifyou are using software that runs in the background such as virus protection software or access control software you may need to turn it off before you reinstall system software For instructions see the documentation that came with the software Important t is highly recommended that you back up the data on your hard disk before installing system software Reinstalling Mac OS System Software Note If something goes wrong see Problems During Installation on page 60 Start up from the software install CD ROM disc See Chapter 3 Starting Up From a CD on page 45 Double click the Mac OS Install icon Mac 05 Install A
52. Mac computer features a built in 56K hardware modem This internal modem supports both K56 Flex and V 90 communications protocols Modem Performance Issues To be able to accomplish 56K connections your Internet Service Provider or service you are connecting to must have digital connections to the Telephone Company and then install special 56K digital modems which can use these connections By using a digital connection a digital to analog to digital conversion can be eliminated at their end which allows support of a higher speed transmit protocol from their site This means that users will not get 56K connections if one user calls another user directly Because they lack the digital connections they will connect at around 33 6 connections consistently Modem 32 If you have a modem that supports this higher speed protocol you can theoretically download data at up to 56 000 bps With these 56K protocols however your upload speed is still going to occur at V 34 speeds up to 33 6 because the digital equipment is only on your ISP s end While the technology theoretically can achieve download speeds up to 56 kbps current FCC rules limit the power output of modems such that you probably will not achieve that maximum speed The maximum speed possible under this regulation is 53 Kbps Users who have unstable phone lines are finding they still can t get speeds above what they were getting with their V 34 28 8 33 6 modem Remembe
53. O Panel 0 Panel Before you begin remove the following e Lower access cover e Logic board mass storage chassis Screws lol Take Apart I O Panel 26 1 Remove the two screws that secure the I O panel 70 Panel to the chassis Screws lol Take Apart I O Panel 27 2 Tilt the I O panel outward and unhook the I O panel tabs from the chassis ere SDRAM 28 lol Take Apart Processor SDF AH Mote This is the underside of the Processor Card SDRAM Before you begin remove the following e Lower access cover e Logic board mass storage chassis Processor top shield e Processor card Note There are two expansion slots one on top and one underneath for RAM modules on the processor card This picture shows the RAM slot on the underside The procedure is the same for the top slot lol Take Apart SDRAM 29 1 Pull the metal snaps on either side of the RAM DIMM to the sides The connector will tilt up 2 Pull the RAM DIMM out Metal SDRAM Snaps Note Remove installed SDRAM from the processor _ card before returning the processor card to Apple Processor Shield Frame 30 lol Take Apart i Processor Shield Frame Processor Shield Frame Before you begin remove the following e Lower access cover e Logic board mass storage chassis Processor top shield Processor card Processor Shield Frame 31 lo
54. OS Help choose Help from the Finder s Help menu QuickDraw 3D could not be found message appears a Make sure that the following files are in the Extensions folder inside the System Folder m QuickDraw 3D m QuickDraw 3D RAVE a QuickDraw 3D Viewer a QuickDraw 3D IR If the files are there and you still get the message it means that you don t have enough memory to run the application You may be able to open the application if you try one or more of the following m Quit other open applications Reduce the amount of memory allocated to the application Follow these steps 1 Select the application s icon in the Finder 2 Choose Get Info from the File menu 3 Type a lower number in the box for Preferred Size a Install more memory RAM See the online documentation that came with your computer for instructions on how to do this Problems Using Your Computer 43 CHAP Starting Up From a CD To test repair or initialize a hard disk or to install or remove system software on a hard disk you need to start up your computer from another disk You can start up your computer using the software install CD ROM disc Starting Up From the Software Install CD Follow these steps to start up from the software install CD Turn on your computer if it s not already running Press the Open button on your CD ROM drive Carefully open the tray and place the software install CD in the tray with the disc label facing up Make sure
55. S partitions m Use PC Exchange to mount these partitions as individual volumes on the desktop PC Exchange is a control panel that is part of system software Note If the disk contains both Mac OS and DOS format partitions PC Exchange will recognize only the Mac OS partition Can t resize Mac OS DOS or ProDOS partitions To resize or reformat multiple Mac OS DOS or ProDOS partitions you need to use third party software designed for partitioning hard disks and removable media cartridges Problems With CD Drives and Discs CD disc is jammed The normal way to remove a CD disc from your computer is to drag the disc s icon on the desktop to the Trash You can also select the disc s icon and choose Eject from the Special menu Removable discs are usually ejected when you shut down your computer Warning Turn off your computer before you attempt to remove a jammed disc If you don t you may damage the CD ROM drive Ifa disc is jammed shut down your computer Locate the small hole in the middle of the CD ROM disc drive tray and carefully insert the end of a large straightened paper clip Push gently until the disc is ejected Do not use excessive force Emergency ejection bole Icon doesn t appear on desktop a Make sure that the disc label is facing up and the disc is centered in the tray m Make sure the tray is closed all the way m Try restarting your computer m Make sure that the Appl
56. Some older 3D applications don t use QuickDraw 3D for rendering and cannot be accelerated If the Control Strip is overlapping or touching the 3D window hide the Control Strip or move the window Some applications allow you to turn hardware acceleration on or off Check your application s documentation to be sure that hardware acceleration is turned on Check that the following files are in the Extensions folder which is in the System Folder a ATI 3D Accelerator a ATI Graphics Driver Problems Using YourComputer 37 a ATI Video Memory Manager Note If these files are missing you need to reinstall system software in order to have them on your computer Turn off virtual memory Apple recommends turning off virtual memory whenever you use 3D applications Open the Memory control panel click the Off button in the Virtual Memory section of the control panel and restart your computer Right angle bracket prompt gt appears Your computer has tried to launch a debugging application perhaps you inadvertently pressed the Command 88 and Power keys at the same time but could not find one on your hard disk Debugging applications are programs that software developers use to locate and fix problems in computer code If you do not have a debugging application installed your screen displays a right angle bracket prompt gt To return to the desktop or your application type G and then press Return Clock doesn t kee
57. Welcome dialog box describes the steps in the installation process To learn more about each step click the Help button in the upper right corner of the window o Install Mac OS 8 1 B b x Welcome Click to display more information about each step Welcome to the Mac 0S 8 1 installation program This program will guide you through the four steps necessary to install Mac 05 8 1 7 Select a destination disk 2 Read important information 3 Respond to the software license agreement 4 Install software Click Continue to begin the first step GoBack 3 When you re ready to begin click Continue If necessary use the pop up menu to choose another destination disk The Select Destination dialog box appears o iMac Install Data ft A Select Destination Choose a disk to install the software on then click Select Destination Disk Macintosh HD System software currently installed 8 1 Available disk space 3800 MB Approximate disk space required for basic installation 214 MB This disk has enough space for a basic installation If you want to perform a clean installation skip to Performing a Clean Installation on page 58 Otherwise continue with the following step Note A clean installation gives you a fresh start with system software It is sometimes the best way to
58. a volt meter to test for power at the power supply to power filter cable Refer to the picture below to locate the necessary test point referenced in the following procedure Unplug the power supply to power filter cable from the back side of the logic board mass storage chassis Plug in the iMac but leave it powered OFF Note You may need to unplug the RGB video cable to access the power cable Grounded Power Supply Connector Test to Power Filter Probe Cable keg Fin F Testing for Power at the Power Supply to Power Filter Cable Ground the black probe on the volt meter to the computer s metal chassis Carefully touch the red probe to the first pin on the top right end of the power cable the top being the side with the connector key on it If you get a 5V reading you know you have power from the power supply and that the power cable is likely OK There still could be a problem with other pins on the cable however ol Troubleshooting General Testing for Power 7 At the Power Supply Board Note The procedure below tests for 5 V on the original iMac power supply board 661 2081 Refer to the procedure on the next page to test for 5 V on the Version 2 661 2167 power supply board First remove the top access cover and then remove the CRT EMI shield to reach the power supply board warning In this next procedure the power supply will be exposed and the unit plugged in Use extreme caution and avoid touchin
59. ac Processor Module The iMac logic board comes with a removable processor module which can be replaced The processor should rarely fail and should be replaced only as a last resort Processor modules can be ordered from Service Logic Board Battery The battery on the logic board controls the stored system settings such as date and time It is important to note that the battery does not affect power at startup The battery should be replaced if the system loses date and time settings Note The iMac uses a lithium battery that must be disposed of in accordance with hazardous waste regulations lol Troubleshooting General HFS Plus Formatted Drives 15 HES Plus Formatted Drives The hard drive in the iMac is formatted with HFS Plus also referred to as Mac OS Extended format It is important to note that Norton Utilities version 3 5 is not compatible with HFS Plus or Mac OS Extended format and in fact can destroy data on the hard drive Norton Utilities version 3 5 3 or 3 5 2 will not attempt to repair a drive formatted with Mac OS Extended format and versions 3 5 1 and earlier cannot recognize that a hard drive is in Mac OS Extended format and can result in hard drive corruption and loss of all data on the drive Note When diagnosing hard drive problems it is important to verify whether or not the customer may have used the wrong disk repair software for their drive before assuming that the problem is hardware relat
60. al Displays Not Supported 6 External Displays Not Supported Connecting an external display to the iMac is not supported by Apple The db 15 port on the iMac was not designed to support an external monitor Apple designed iMac with a very sharp 15 inch internal display and no video out port to connect a second display Refer to Tech Info Library TIL article 43016 iMac Can Attach an External Display for more information lt u gt iMac Updates 7 iMac Updates Apple has released a number of updates for the iMac Refer to TIL article 58174 iMac When to Install Available Updaters This TIL article will clarify when to use the available updates depending upon which version of iMac you have Additional iMac Update articles e TIL article 26115 CD Firmware Update 1 0 The CD Firmware Update reduces the amount of vibration caused by certain CDs in the internal CD ROM drive TIL article 44005 iMac Update 1 0 Software Apple made improvements to its Universal Serial Bus USB software e TIL article 58178 About iMac Update 1 1 Apple made additional improvements to its USB software The iMac Update 1 1 includes these new improvements lt p iMac Updates 8 and those previously released in iMac Update 1 0 This update improves the ability of iMac to identify USB devices when starting up improves the startup time when many USB devices are connected and enables new USB solutions You do not h
61. ally would Note If you use a CD ROM disc with a removable sticky label remove the label before inserting the disc Tray won t open Ifa CD ROM disc icon appears on your screen Select the disc icon and choose Put Away from the File menu or drag the icon to the Trash Note You won t lose information on the CD by dragging its icon to the Trash If the AppleCD Audio Player is active choose Eject CD from the File menu or click the eject button in the AppleCD Audio Player controller If you see a message that a disc can t be put away because it is being shared turn file sharing off in the File Sharing control panel in the Control Panels folder available in the Apple menu Ifno CD ROM disc icon appears on your screen m Restart your computer Immediately after you hear the startup sound press the Open button on your CD ROM drive a The signal to open the tray may not be reaching the computer Manually remove the disc as described in the online documentation that came with your computer If neither of these suggestions works your CD ROM drive may be damaged Contact an Apple authorized service provider or Apple for further assistance Problems Using Your Computer 31 32 Chapter 2 Can t eject disc If file sharing is on and you are having trouble ejecting a disc turn file sharing off in the File Sharing control panel in the Control Panels folder available in the Apple menu This is not a Macint
62. an t Select Features or Access Sites or Error Connecting to Online Site Can t Connect to Remote Access Server or ISP Modem Disconnects Modem Not Connecting If more than one browser is installed check to see if the problem occurs with both browsers If necessary reinstall the browser software Note Internet Explorer 4 and greater needs to be installed and not just drag copied 1 Make sure the software is fully installed and all required extensions are enabled If necessary reinstall the dialup software 2 If the user has a second line try that one The user should contact their local phone company and request their line be checked 1 Check to make sure the TCP IP control panel is correctly configured for the user s Internet service provider If the TCP IP control panel is not configured correctly it will connect but won t be able to access any sites 2 Sometimes online services use different servers for dialup authentication and for services If one server is down users may be able to login but not access any services Contact the online service for help 1 Verify the phone number of the server you re trying to call Dial the number using a regular telephone and listen for the whistle of a modem Make sure you re calling the type of server for which you ve set up Remote Access 2 Ifyou don t have access to the server you may get an Authentication Failed message Make sure you are a registered user on the
63. are properly connected and turned on p 14 a Re bless the System Folder p 16 m Resolve system extension conflicts p 17 Reset the PRAM p 19 Test and repair the hard disk directory p 21 m Reinstall system software p 21 Icon with X appears Try this solution a Make sure you re using the correct disk as a startup disk p 16 Computer beeps Try these solutions One or two beeps Make sure memory is installed correctly p 20 m Three four or five beeps Contact an Apple authorized service provider See the service and support information that came with your computer Computer freezes Computer freezes before Welcome to Mac OS appears Note Startup may take several minutes if you have more than 32 megabytes MB of RAM installed because of the time it takes to verify that the RAM is functioning properly Try these solutions a Take notes p 11 Make sure external devices are properly connected and turned on p 14 m Force your computer to restart p 12 a Test and repair the hard disk directory p 21 Reinstall system software p 21 Computer freezes during startup or while you re using your computer Try these solutions a Take notes p 11 Make sure external devices are properly connected and turned on p 14 m Force your computer to restart p 12 m Resolve system extension conflicts p 17 a Test and repair the hard disk directory p 21 Reinstall
64. at a time starting up verifying the devices work and shutting down until you determine which device is causing the problem Then refer to the documentation that came with that device as well as the information on connecting equipment in the online documentation that came with your computer If this doesn t solve your problem return to Problems on page 7 Check RAM disk settings in the Memory control panel If you re using a RAM disk and you see a disk corruption message at startup click Cancel to close the message Check the RAM disk settings in the Memory control panel to make sure that you aren t trying to create a RAM disk larger than the amount of free space on your hard disk If this doesn t solve your problem return to Problems on page 7 Increase the memory available for system software If you re having trouble starting up your computer there may not be enough memory to load all the system software extensions you ve installed Restart the computer holding down the Shift key until you see the message Extensions Disabled in the Welcome to Mac OS box Then try the following Turn on or increase virtual memory in the Memory control panel Your computer will perform well with virtual memory set to no more than twice the amount of RAM in the computer for best performance limit virtual memory to 1 5 times the amount of RAM m Reduce the size of the disk cache in the Memory control panel
65. ave to install iMac Update 1 0 before you install iMac Update 1 1 TIL article 58370 iMac How to Ensure Firmware Update is Successful If you performed the iMac firmware update and it was not successful this article provides some additional assistance ensuring the update is successful lt u gt CD ROM Door Not Latching Closed 9 CD ROM Door Not Latching Closed After manually ejecting CDs from the iMac CD ROM tray of both A and B models the eject mechanism sometimes does not reset into a position that allows the tray door to close properly Instead of replacing the CD ROM assembly the eject mechanism can be manually reset with a paperclip to correct the problem Refer to Resetting CD ROM Eject Mechanism in Additional Procedures lt u gt Revision vs Version Part Numbers 10 Revision vs Version Part Numbers Moving forward the Service Parts database will identify service parts upgrades changes or variations with the word Rev Revision or Ver Version appended to the part name For example 661 2193 Card Processor 333 MHz Rev 3 661 2113 Board Logic iMac Ver 2 Revision Rev A change or upgrade to the part The new Rev is backward compatible and will eventually replace the earlier part number e Version Ver A different variation of a similarly functional part The versions are not interchangeable lt u gt Version 2 Service Parts 11 Version 2 Service Part
66. ble Cable a Take Apart Logic Board Mass Storage Chassis 10 3 Using the handle pull up on the chassis and slide the logic board mass storage chassis out of the unit Logic Board Mass Storage Chassis i Replacing the Logic Board Mass Storage Chassis lol Take Apart Logic Board 11 Product ID Label Logic Board Logic Board Before you begin remove the following Lower access cover e Logic board mass storage chassis Note Identify the 661 2113 and the 661 2061 logic boards by the graphics controller chip at location U12 The 661 2061 logic board has the ATI Rage llc chip at U12 The 661 2113 logic board on the Bondi Blue M6709LL B iMac model has the ATI Rage Pro Logic Board 12 chip at U12 The 661 2113 logic board on the 266 MHz Lime Grape Blueberry Strawberry and Tangerine iMacs will have the ATI Rage Pro Turbo chip at location U12 The 661 2113 board is not backward compatible with iMac Logic board 661 2061 Refer to the Service Parts database for more information lol Take Apart Logic Board 13 1 Disconnect all the cables on the logic board 2 Remove the five screws that secure the logic board to the chassis Screws Logic Board 14 lol Take Apart Remove the two flathead screws that secure the I O panel to the chassis Tilt the I O panel away from the chassis to remove the logic board Note The metal tabs on
67. c Chip ATI Rage Pro Turbo Model Comparison 7 Strawberry no IrDA M7389LL A OS Software Mac OS 8 5 1 ProcessorSpeed 266 MHz Reset Procedure Front Power Button Standard SGRAM 2 MB SGRAM Built in 4 MB SGRAM DIMM Hard Drive 6 GB Graphic Chip ATI Rage Pro Turbo Grape no IrDA M7390LL A OS Software Mac OS 8 5 1 ProcessorSpeed 266 MHz Reset Procedure Front Power Button Standard SGRAM 2 MB SGRAM Built in 4 MB SGRAM DIMM Hard Drive 6 GB Graphic Chip ATI Rage Pro Turbo Model Comparison 8 Tangerine no IrDA M7391LL A OS Software Mac OS 8 5 1 ProcessorSpeed 266 MHz Reset Procedure Front Power Button Standard SGRAM 2 MB SGRAM Built in 4 MB SGRAM DIMM Hard Drive 6 GB Graphic Chip ATI Rage Pro Turbo Lime no IrDA M7392LL A OS Software Mac OS 8 5 1 ProcessorSpeed 266 MHz Reset Procedure Front Power Button Standard SGRAM 2 MB SGRAM Built in 4 MB SGRAM DIMM Hard Drive 6 GB Graphic Chip ATI Rage Pro Turbo Model Comparison 9 333 MHz iMac Models On April 14 1999 Apple announced the 333 MHz iMac There were no other configuration changes to these computers other than the processor speed Blueberry M7440LL A Strawberry M7441LL A Grape M7442LL A Tangerine M7443LL A e Lime M7444LL A New Technologies 10 New Technologies Infrared Communication The iMac models M6709LL A and M6709LL B come with built in 1 megabit i
68. c may be damaged Try another disc in the drive and try the original disc in another drive If the original drive reads other discs or if the original disc also doesn t work in another drive the disc is probably damaged You need to replace it Problems Using ISO 9660 or High Sierra Discs Files can t be opened Discs in the ISO 9660 and High Sierra disc formats have version numbers attached to file names Some application programs need these version numbers in order to work with files To make the version numbers available to programs on your computer drag the CD ROM disc icon to the Trash When the tray opens hold down the Option key and push the tray back in Continue to hold down the Option key until the disc is mounted in the drive The program you are using should now be able to locate file names on that CD ROM disc m Make sure that the Foreign File Access ISO 9660 File Access and High Sierra File Access files are present in the Extensions folder in the System Folder on your hard disk If these files are not present reinstall your CD ROM software The easiest way to do this is by reinstalling your system software See Chapter 5 Reinstalling Your Computer s Software on page 53 Problems Using Photo CDs Icon doesn t appear on desktop m Reinstall the CD ROM and QuickTime software The easiest way to do this is by reinstalling your system software See Chapter 5 Reinstalling Your Computer s Software on page
69. came with your computer for instructions on how to do this Important Batteries contain chemicals some of which may be harmful to the environment Please dispose of used batteries according to your local environmental guidelines Replacing the battery may affect the settings in some of your control panels including the following a Date amp Time Memory information lost includes RAM disk settings Monitors amp Sound Keyboard and Mouse or Trackpad m AppleTalk Connect via is set to the Ethernet port a Map Make sure you make a note of the settings before you replace the battery Note You may also have to restore modem settings in any communications software programs you are using If this doesn t solve your problem return to Problems on page 7 Test and repair the hard disk directory Follow the instructions in Chapter 4 Testing and Repairing Your Hard Disk Directory If this doesn t solve your problem return to Problems on page 7 Reinstall system software Follow the instructions in Chapter 5 Reinstalling Your Computer s Software If this doesn t solve your problem return to Problems on page 7 Problems Starting Up 21 Where to Find Onscreen Help Mac OS Help Step by step instructions for using the Mac OS are available from Mac OS Help About Help Show Balloons Help 3 To open the help system choose Help from the Finder s Help menu
70. card as shown here and one slot is on the underside of the processor card Lower Access Cover VRAM Before you begin position the iMac face down on an ESD mat 7 Remove the lower access cover lol Upgrades 8 8 Remove the two screws at the top of the logic board mass storage chassis and disconnect the cables and screw clamp Logie Board Mass Storage Jo Chassis 9 Logie Board Mass Storage Chassis Using the handle pull the main logic board mass storage chassis from the unit 10 10 Place the logic board mass storage chassis on an ESD mat 11 lol Upgrades MR NNotch ANAONA NNN SS Tab PAN VRAM Expansion Slot gt Metal Tab WN KAM SEE O PORORL 2222 SOE CLIO ECOL oo NEES q SICAL SIG S 22222 6 NED Z 11 Line up the notch in the SGRAM DIMM expansion card with the small plastic tab in the VRAM expansion slot Push in on the VRAM card and then down until the two metal snaps click into place Service Source Adjustments iMac Adjustment Tools 1 Adjustment Tools The following items are needed to perform video adjustments on the iMac e Display Adjustment Utility a light meter The utility can be found on the Service Source CD or under the Diagnostic link found on the Troubleshooting and Repair page online at http service info apple com ol Adjustments 10
71. ce providers CRT 112 lol Take Apart CRT Awarning This product contains high voltage and a high vacuum picture tube To prevent serious injury discharge the CRT Before you begin remove the following e Lower access cover e Main logic mass storage chassis Bottom rear housing e Front lower panel e Front outer bezel Top rear housing EMI shield CRT 113 Note There is a Ver 2 CRT Refer to the Service Parts database for additional information The Ver 2 CRT is not backwards compatible E Take Apart CRT 114 1 Remove the eight screws attaching the CRT frame to the inner plastic bezel There are four screws on each side Note This graphic shows the computer without an analog video board attached The CRT can be removed without removing the analog and power supply boards see Shortcut on the next page all Take Apart CET Bezel Frame CRT 115 Lift the CRT bezel frame off the CRT Shortcut With the analog and power supply boards in place remove the video board off the CRT neck Disconnect P701 large 4 pin connector on the analog board P702 3 pin cable in the upper left corner of the analog board Remove the anode cap Disconnect the microphone cable Lift the CRT bezel frame and boards off the bezel all Take Apart CRT Ground wire CRT 116 3 Lift the CRT off the front inner bezel Note If you re replacing
72. check the age of the R77 light meter by its four digit manufacturing date stamp such as 0398 for March 1998 Caution Dropping the meter can permanently damage its accuracy A shock damaged meter might read incorrectly or its pointer may not drop to zero Adjustment Tools 6 Red Area Scale Im 1 1114 15 16 17 1B Model L 248 1 Press the red button on the back of the light meter If the reading is out of the red area replace the battery Move the side switch to its upper position so that the scale reads 10 through 18 Uncover the lens of the meter Place the lens against the middle of the screen and press the read button to read the scale Adjustment Tools 7 lol Adjustments Lens Swivel Head Scale Model 246 This topic covers setup for light meter Model 246 1 Remove the metal slide if installed from the top of the light meter 2 Install the white lens with the red dot 3 Swivel the head so the lens of the meter faces the monitor 4 Place the lens against the middle of the screen and read the scale lol Adjustments Geometry 8 O Display Adjustment Utility Height 22222 Horizontal SS Vertical Keystone ee Pincushion Rotation s __ Parallelogram I Pincushion Bal S Factory Settings 4D 47 07 36 4A 08 08 Geometry The Geometry adjustments shown are co
73. chines Never install the 256K or 512K video memory DIMMs used in older Macintosh computers See SGRAM Video Memory in the Basics chapter Error Beeps If problems are detected upon startup the iMac system will sound one or more error beeps See Error Beeps in the Troubleshooting chapter lt u gt HFS Plus Formatted Drives 4 HES Plus Formatted Drives The iMac hard drive is formatted from the factory with Mac OS Extended format also referred to as HFS Plus Norton Utilities version 3 5 is not compatible with HFS Plus and version 3 5 1 and earlier can result in hard drive corruption and loss of all data on the hard drive See HFS Plus Formatted Drives in the Troubleshooting chapter lt u gt Forcing a Restart 5 Forcing a Restart If holding down the Command Control and Power keys fails to restart the iMac computer after a system hang you can force a restart in one of two ways First try inserting a straightened paper clip in the reset button hole Open the I O door on the side of the iMac The reset button hole is the top hole located between the Ethernet and modem ports and marked with a triangle symbol If the reset button method doesn t work try the following 1 Unplug the power cord 2 Wait at least 30 seconds and then reconnect the power cord 3 Restart the iMac by pressing the power button on either the keyboard or the front of the computer lt u gt Extern
74. correct port is being pinged m Check that your TCP IP configuration is correct m Check that the Use 802 3 checkbox isn t selected in the TCPAP control panel Problems With Sound and Video Can t hear any sound Ifyou have headphones connected to the computer make sure they are firmly connected Make sure the volume control on your headphones is not turned down too low Ifyou do not have headphones connected to the computer make sure that nothing else is plugged into the computer s sound output port 0 a Ifyou are using a CD ROM disc over a network you won t be able to hear the audio portion m Make sure that the correct sound source is selected in the Monitors amp Sound control panel or in the Sound Source module in the Control Strip m Make sure the volume is turned up in the Monitors amp Sound control panel m Make sure the volume is turned up in the AppleCD Audio Player With the program open drag the volume control slider up use the volume controls on your computer or press the Up Arrow key on your keyboard a The CD may have been paused Click the Play Pause button in the AppleCD Audio Player Problems Using Your Computer 41 42 Chapter 2 Audio stops playing when you double click a CD ROM disc icon You can t open data files on a CD ROM disc and listen to audio tracks on it at the same time Audio CD begins playing automatically when inserted Your computer is set to automatically begin
75. ct Board 36 Audio Video Interconnect Board The audio video interconnect board provides a bridge between the logic board and the audio on off video and IrDA boards The audio video interconnect board sits between the logic board and the logic board mass storage chassis For example one cable runs from the IrDA board to the audio video interconnect board then a separate cable runs from the opposite side of the audio video interconnect board to the IrDA connector on the logic board The same is true for connections between the logic board and the video and audio on off boards Note Apple does not support connecting an external monitor on the iMac Connecting an external monitor will void the warranty Refer to TIL article 43016 Power Supply Board Fuse 37 Power Supply Board Fuse There is a fuse on the AC line on the iMac power supply board The fuse is located at F901 near the bottom right corner of the installed power supply board as you face the back side of the board Instructions for how to test the fuse are included in the Testing for Power section of the Troubleshooting chapter Graphics Controller 38 Graphics Controller The graphics subsystem on the iMac logic board is designed with the ATI Rage llc graphics controller ASIC The RAGE 110 ASI contains 2D and 3D acceleration engines a bidirectional digital video port a front end scaler a back end scaler CRT controller and PCI bus master capab
76. d Green Blue White Grid Black Grid Focus Select White from the Pattern menu Hold a light meter or photometer against the center of the screen The screen luminance reading should be one of the following 21 foot candles on light meter Model R77 Upper end of 10 on the 10 through 18 scale of light meter Model L248 21 foot candles on the red scale of light meter Model 246 Cutoff 24 lol Adjustments Oo SS Display Adjustment Utility Red Drive Green Drive Blue Drive Red Cutoff Green Cutoff Blue Cutoff Sub Contrast Sub Brightness B 5 Adjust the Sub Contrast slider to increase the screen brightness until the luminance measures correctly Important The Display Adjustment Utility requires that your system be restarted in order for Color Sub Contrast or Sub Brightness changes to take effect Click the Save button in the Color window to save your settings Focus 25 lol Adjustments Focus Awarning This product contains high voltage and a high vacuum picture tube To prevent serious injury review the Saftey information on Service Source Before you begin remove the following Lower access cover Bottom rear housing e Front lower panel e Front outer bezel Top rear housing EMI shield ia Adjustments Focus 26 Gray Bars Black White Red Green Blue White Grid Black Grid Power on the computer Open the
77. d 20 Awarning The heatsink may be hot to the touch if the computer has been on for awhile 2 Pry the heatsink clip off the processor shield frame lol Take Apart Processor Card 21 3 Lift the heatsink off the processor card all Take Apart Processor Card Processor Card 22 4 Pry the processor card from the logic board connectors This can be done with a spring hook removal tool or carefully with the heatsink clip as shown in the graphic Note Remove the heatsink and SDRAM before returning the processor card to Apple Do NOT remove the rubber gap filler on the microprocessor chip lol Take Apart Modem 23 Logic Board Underside Modem Before you begin remove the following Lower access cover Logic board mass storage chassis I O panel Logic board Note A pair of needlenose pliers is required to remove the modem from the modem standoff Modem 24 lol Take Apart Modem Standoff 1 Turn the logic board over resting it on an ESD mat 2 Squeeze the modem standoff with a pair of needlenose pliers to remove the modem from the logic board Note If you are replacing the modem keep the plastic standoff Install the standoff on the replacement modem If you are returning the logic board to Apple remove the modem and the standoff Install them on the replacement logic board lol Take Apart I O Panel 25 T
78. d item to give you access Check with the owner of the item to make sure you are entering your name exactly as the owner specified including spaces and capitalization and try again You can t remember your Administration password Erase your Administration password along with all of your AppleTalk settings and configurations by dragging the AppleTalk or TCP IP Preferences file inside the Preferences folder in your active System Folder to the Trash When you open the AppleTalk or TCP IP control panel again you must reenter all your settings Your computer can t connect to devices outside its local network a Check that your router address is correct in the TCP IP control panel Your computer can connect to hosts by IP address but not by name m Check the settings in the TCP P control panel m Check that you have entered valid domain names in the Additional Search Domains box a Ifyou have entered your local and administrative domain names double check to make sure they re correct m Check that the domain name server DNS you have selected is actually a DNS server and is operating properly m Check with your Internet service provider ISP or network administrator if you have questions about configuring the TCP IP control panel Servers Your computer does not respond to a ping m Check that you have an application open on your computer that uses TCP IP and can respond to a ping from another computer and that the
79. d later in this section Apple Service Providers planning to support the computer systems covered in this manual may purchase Service modules and parts to develop servicing capability To order parts use the AppleOrder US only or ARIS Canada only systems and refer to the iMac Service Price Pages Strategy and Ordering 60 Large businesses universities and K 12 accounts must provide a purchase order on all transactions including orders placed through the AppleOrder US only or ARIS Canada only systems USA Ordering US Service providers not enrolled in AppleOrder may fax their orders to Service Provider Support 512 908 8125 or mail them to Apple Computer Inc Service Provider Support MS 212 SPS 2323 Ridgepoint Drive Austin TX 78754 Strategy and Ordering 61 For US inquiries please call Service Provider Support at 800 919 2775 and select option 1 Canadian Ordering Canadian Service providers not enrolled in ARIS may fax their orders to Service Provider Support in Canada 1 800 903 5284 For Canadian inquiries please call Service Provider Support 800 217 9517 Warranty 62 Warranty Following are the details of the warranty AppleCare program for the US and Canada US Only The iMac computers are covered under the Apple One Year Limited Warranty The AppleCare Protection Plan is also available for these products Service Providers are reimbursed for warranty and AppleCare Pro
80. ding on the size of your disk Start up your computer from the software install CD See Chapter 3 Starting Up From a CD on page 45 2 Locate the Drive Setup icon and double click it to open the Drive Setup program Drive Setup 3 Inthe list of drives click the disk you want to test Drive Setup EN List of Drives Yolume Name s Macintosh HD lt CD ROM drive gt Select a drive and then a function Initialize From the Functions menu choose Test Disk When a message tells you that the testing is complete click Quit If the test reveals a problem the hard disk may be damaged Consult an Apple authorized service provider for assistance Testing and Repairing Your Hard Disk Directory 51 CHAP Reinstalling Your Computer s Software If you are having problems with the system software or applications that came with your computer you can replace software in the following ways reinstall system software if you encounter system software problems or you want to add or remove system software components reinstall individual applications if you inadvertently erased an application on your hard disk are having problems with an application or an application is damaged restore your hard disk with its original contents if you want your computer to have its original system software factory settings and applications that came with the computer Reinstalling System Software The
81. e Exploded View chapter The Rev 2 power supply board is not backwards compatible and must be used with the other Ver 2 service parts lol Take Apart Power Supply Board 100 Before you begin discharge the CRT and remove the following Lower access cover Main logic mass storage chassis Bottom rear housing Front lower panel e Front outer bezel Rear top housing EMI shield lol Take Apart Power Supply Board 101 Screws Remove the three silver screws on the power supply board Note There are two versions of the power supply board 661 2081 shown here and 661 2167 Ver 2 They must be exchanged like for like Refer to the Service Parts database or the Exploded View wiring diagram for the Rev 2 analog video and Rev 2 Power Supply boards for additional information Power Supply Board 102 Note The power supply has a ground clip connected near the AC plug not shown here When replacing the power supply remove the ground clip from the defective board and place it on the new service part The ground clip does not ship with the new service part Power Supply Board 103 a Take Apart Fower Supply 2 Disconnect three cables on the board P902 brown cable the multi colored power cable and P908 the gray cable Lift the board off the chassis Note There is a fuse on the AC line on the power supply board The fuse is
82. e power supply board lol Troubleshooting General Testing for Power 4 Testing for Power The iMac requires trickle voltage 5 TRKL in order to power on If you are experiencing power problems in the iMac unit you will want to test for trickle power at various points in the system to pinpoint the location of the problem and to determine whether or not the power supply is functioning normally If you have trickle power in the system the odds are your power supply is OK In general you should test for power at the AC outlet first Next it is best to start at the end in this case the logic board and trace power backwards through the system In this way you will be able to immediately pinpoint which component is failing Note It is highly unlikely that the power filter board will fail therefore you need not test for power at this component Following is the order in which you should test for power in the system At the 1 AC outlet 2 logic board 3 power filter cable 4 power supply board and 5 power supply fuse Testing for power requires that you remove certain parts from the computer Refer to the Take Apart chapter for instructions on removing parts At the AC Outlet First unplug the keyboard from the computer Then using a known good power cord power on the system using the power button on the front of the computer If the system powers on you can assume the AC outlet is good and the problem is with the k
83. e CD ROM and Foreign File Access extensions are turned on in the Extensions Manager control panel Then restart your computer m Try starting up your computer from the system software CD that came with your computer Insert the CD and restart while holding down the C key See Chapter 3 Starting Up From a CD on page 45 If only the hard disk icon appears on the desktop then there may be a hardware problem with your CD ROM drive If the CD ROM disc icon appears above the hard disk icon reinstall your CD ROM software The easiest way to do this is by reinstalling your system software See Chapter 5 Reinstalling Your Computer s Software on page 53 m The disc may use a format that the Macintosh cannot recognize Ask the disc s manufacturer for a disc that a Macintosh can recognize Disc is vibrating in the drive m Make sure the disc is centered in the tray Some CD ROM disc labels have artwork that is noticeably thicker on one side than the other and can cause the disc s weight to be slightly off center This uneven distribution of weight coupled with the high rotation speed of your CD ROM drive can cause some discs to wobble in the drive and make your computer vibrate The vibration does not damage the CD ROM disc or the computer and affects very few CD ROM discs If you can feel or hear that the CD ROM disc is vibrating in the computer you don t need to do anything special continue to use the CD ROM disc as you norm
84. e and it is not working the problem may be with the external device itself or its cable Replace the external microphone speaker or headphone in question with a known good device If the problem persists replace the logic board No Go to next step Reset parameter RAM Hold down lt Command gt lt Option gt lt P gt lt R gt during startup until Welcome to Macintosh appears Verify that both ends of the internal speaker cables are attached securely Reseat replace the audio cable going from the A V interconnect board to the main logic board Make sure both ends of the cable are firmly seated into their connectors Reseat replace the audio cable 922 3624 or 922 3836 Rev 2 at the A V interconnect board and the power headphone board 922 3568 Plug known good headphones or external speakers into the external jack Do you get sound Yes Go to next step No Replace the logic board Replace the A V interconnect board Replace the power headphone board Replace the logic board lol Troubleshooting Symptom Charts Sound In Problems 31 Sound In Problems 1 Audio recording quality is poor a high level of background noise is noticeable or no sound is recorded Open the Simple Sound Control Panel found under the Apple Menu Select CD Quality under the Sound menu to minimize noise on the internal microphone Did this solve the problem Yes If the initial sound in problem was with the sound control panel the
85. e box click Continue The Select Destination dialog box appears o iMac Install Data ft A Select Destination Choose a disk to install the software on then click Select Destination Disk Macintosh HD System software currently installed 8 1 Available disk space 3800 MB Approximate disk space required for basic installation 214 MB This disk has enough space for a basic installation C 4 Click Options M Perform Clean Installation Installs a completely new System Folder that does not include your third party extensions control panels or fonts System software and application preferences are reset to their default settings Cx 5 Click the Perform Clean Installation checkbox so that it has a checkmark in it then click OK Click Select and follow the instructions until you see the Install Software dialog box 7 10 install software other than the basic system click Customize and follow the instructions in the section Custom Installation on page 56 8 Click Start to install the software A new System Folder is installed on your hard disk The old System Folder is renamed Previous System Folder 9 Restart your computer from the hard disk If the problem is solved See the following section that describes how to reinstall your custom extensions fonts and control panels If the problem is not solved You can r
86. e into the Preferences folder Close the System Folder Rename the System Folder Clean System Folder Rename the Previous System Folder the one you wish to use again System Folder Open the newly designated System Folder and double click the System suitcase Close the window that appears then close the System Folder The Mac OS icon should appear on the new System Folder s icon If it doesn t appear repeat this step Restart your computer Drag the Clean System Folder to the Trash Problems During Installation This section helps you solve problems you may encounter while installing your software You can t start up the computer using the software install CD Your computer may have located the system software on your hard disk before it located the system software on the CD With the CD inserted open the Startup Disk control panel and click the CD icon Then restart the computer Note After you install the software you ll need to reselect your hard disk as the startup disk Open the Startup Disk control panel again and click the icon for your hard disk Then restart your computer The files on your hard disk disappear when you start up from the CD If no files appear on the hard disk except for a single document called Where have all my files gone you started up your computer from a CD with system software earlier than Mac OS 8 1 To see the contents of your disk you must start up your computer
87. e manually reset with a paperclip to correct the problem 2 lol Additional Procedures E ject Mechanism CD ROM Position the iMac on its side Insert a paperclip into the manual eject hole on the front of the CD ROM tray door to open the tray Note The manual eject mechanism is accessed from the underside of the CD ROM drive lol Additional Procedures 3 Eject Mechanism CO rOM Hold the bezel of the CD ROM With a paperclip move the eject mechanism toward the CD bezel as shown Push the eject mechanism forward until you hear a click Close the CD ROM tray If the tray doesn t latch check that the eject mechanism is clear and free of plastic parts If it still doesn t latch the CD ROM drive should be replaced Emergency Handbook Includes troubleshooting hard disk repair and software installation information for your iMac Apple Computer Inc 1998 Apple Computer Inc All rights reserved Under the copyright laws this manual may not be copied in whole or in part without the written consent of Apple Your rights to the software are governed by the accompanying software license agreement The Apple logo is a trademark of Apple Computer Inc registered in the U S and other countries Use of the keyboard Apple logo Option Shift K for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competitio
88. e regular or melodic they may be caused by interference from electrical equipment Move the computer farther away from any such equipment Ifyou hear one or more beeps there may be a problem with the memory in your computer If you recently installed RAM in your computer check the installation instructions in the online documentation that came with your computer to make sure it is properly installed Make sure you ve used the proper type of RAM for your computer Problems With Networks and File Sharing If you are having problems using the network or file sharing try the following before attempting further solutions m Make sure the network is working by opening the Chooser and checking for the shared disks and printers you usually use See if other computers on your network have access to network devices m Open the AppleTalk and TCP IP control panels and make sure the settings are correct See the topic on file sharing in Mac OS Help choose Help from the Finder s Help menu a Make sure that all the network software is installed The Network and AppleShare extensions should be in the Extensions folder If you want to use file sharing the File Sharing control panel should be in the Control Panels folder and the File Sharing extension should be in the Extensions folder If any of these items is missing reinstall the system software See Chapter 5 Reinstalling Your Computer s Software on page 53 m There may be a physical probl
89. ed If you experience problems with a hard drive that has been formatted with HFS Apple Computer recommends using Disk First Aid 8 2 which is included on the system software CD that ships with the iMac Disk First Aid 8 2 can be used to recover data that may have been deleted by Norton Utilities See the Symantec Web site at http www symantec com nu num hfs html for more information on Norton Utilities and Mac OS Extended format Some other disk utility and disk locking programs are incompatible with Mac OS Extended format Before you attempt to use a disk utility or disk locking program make sure the version you have is compatible with Mac OS Extended format Check the documentation that came with the program or contact the manufacturer or the vendor that supplied the program Use the Get Info command in System 8 1 to determine how a hard drive has been formatted Drives formatted with HFS will appear as Mac OS Standard while drives formatted with HFS will appear as Mac OS Extended For more information on HFS Plus formatting of hard drives refer to the Technical Info Library article 30344 lol Troubleshooting General Testing the Modem 16 Testing the Modem The iMac ships with ClarisWorks a k a AppleWorks software which can be used to test the iMac modem connection You should run this test if the modem is not able to dial out To perform this test 1 Locate and launch ClarisWorks Version 5 0 shi
90. ed on the Macintosh are not accurately displayed on DOS computers See information about working with DOS or Windows documents on your Macintosh in Mac OS Help choose Help from the Finder s Help menu Can t throw away a file m The file may be locked From the Finder select the file s icon choose Get Info from the File menu and click the Locked checkbox to remove the X You can delete locked files that are in the Trash by holding down the Option key while you choose Empty Trash from the Special menu m An application program may be using the file Close the file or quit the program m The file may be in a shared folder that can t be changed You can throw away the file by turning off file sharing temporarily click Stop in the File Sharing control panel Or you can select the shared folder choose Sharing from the File menu and uncheck the box labeled either Can t be moved renamed or deleted or Same as enclosing folder Older Macintosh programs don t work properly Some older Macintosh programs are not completely compatible with Macintosh computers that have the PowerPC microprocessor or Mac OS 8 1 Contact the program s publisher to see if an upgrade is available Window disappears a Another window may be covering the one you re looking for Move resize close or hide windows until you see the one you want a The program the window is associated with may be hidden Choose Show All from the Applicat
91. einstall your custom extensions fonts and control panels or you can restore the previous system These options are described in the following sections Reinstalling Your Custom Extensions Fonts and Control Panels After a clean installation you need to reinstall any custom extensions fonts and control panels you were using If you don t have the original installation discs you can drag items one at a time from the Previous System Folder to the new System Folder It s a good idea to restart your computer after you install each item to see if that s the item causing the problem After you re sure that you ve copied all the items you want into the new System Folder delete the Previous System Folder by dragging it to the Trash Reinstalling Your Computer s Software 59 60 Chapter 5 If the Clean Installation Didn t Solve the Problem You may have a hardware problem Consult an Apple authorized service provider You may want to revert to the Previous System Folder so that you do not have to reinstall your custom extensions fonts control panels and other items not installed with Mac OS 8 1 To use the previous system again follow the steps in this section Warning Reverting to the previous System Folder may not work If it doesn t you ll have to perform a clean installation again Locate the currently active System Folder It is distinguished by the Mac OS icon on it Open the System Folder and move the System suitcas
92. els or Extensions folder They are Infrared Control Panel e IrDALib Extension e IrLanScannerPPC Extension If these icons are not present or disabled you will not be able to make infrared connections from the iMac If you have used infrared communications with other Apple products you will notice a difference with iMac The lens in the rear of the iMac has been updated to support IrDA The new lens has about a 30 degree viewing angle There is also a minimum 3 foot distance for recognizing other Infrared devices New Technologies 13 USB Support Universal Serial Bus USB is a new device communication standard developed by the computer and telecommunication industries USB provides a powerful hot swappable true plug and play interface between a host computer and add on peripheral devices Note Hot swappable means that you can plug in use and unplug devices without having to shut down the host computer USB devices can include keyboards mice joysticks telephones scanners printers security dongles microphones speakers floppy drives cameras modems CD ROM drives etc USB technology can provide support for anticipated future devices as well such as digital subscriber line DSL modems cable modems and MPEG video devices USB was designed to overcome limitations of earlier peripheral connection technologies USB allows end users to New Technologies 14 connect peripheral devices to a
93. em with a cable connector hub or wall jack Make sure network cables are connected properly Try substituting equipment that you know is reliable You can even try a different computer if one is available Computer you want doesn t appear in the Chooser a Make sure the computer you re trying to connect to is turned on a Make sure file sharing is active on the computer you re trying to connect to That computer s File Sharing control panel should say that file sharing is on Shared disk you want to use is not available You may already be connected to the shared disk Check for its icon on your desktop You may not have the access privileges you need to use the shared disk Ask the network administrator or the owner of the shared item to give you access See the information on file sharing in Mac OS Help choose Help from the Finder s Help menu Can t see any files on remote computer a Make sure that files are being shared on the other computer The File Sharing Monitor control panel on that computer lists the items being shared Problems Using Your Computer 39 40 Chapter 2 Make sure you have the access privileges you need to view the files Ask the network administrator or the owner of the shared item to give you access See the information on file sharing in Mac OS Help choose Help from the Finder s Help menu File sharing can t be turned on Make sure AppleTalk is turned on in the Chooser Make sure
94. ensions folder inside the System Folder m QuickDraw 3D m QuickDraw 3D RAVE m QuickDraw 3D Viewer m QuickDraw 3D IR Problems Using YourComputer 27 28 Chapter 2 If the files are there and you still get the message it means that you don t have enough memory to run the application You may be able to open the application if you try one or more of the following Quit other open applications Reduce the amount of memory allocated to the application 1 Select the application s icon in the Finder 2 Choose Get Info from the File menu 3 Type a lower number in the box for Preferred Size Install more memory RAM DOS or Windows document won t open or displays incorrectly If you can t open a DOS or Windows document by double clicking its icon try one of the following Open the document from within the program by choosing Open in the program s File menu Use the PC Exchange control panel in the Control Panels folder in the Apple menu to specify which Macintosh program will open the document Ifa DOS document is displayed incorrectly or you see strange codes or characters in the document try one of the following Your application program may have special procedures for opening and saving documents with different file formats See the information that came with your program or call the program s publisher a Try opening the document in another program Note Some characters that can be display
95. eplace the modem card lol Troubleshooting Symptom Charts Modem Dialing Problems 39 Modem Cannot Dial Out Modem Reports an Error When Dialing Out Computer Freezes When Modem Dials 1 Open the modem control panel and make sure the modem type selected is iMac Internal 56K or Apple iMac internal modem in the Earthlink setup screen the sound is On and the dialing is set to Tone At this point leave the ignore dial tone setting unselected 2 Verify you have the correct CCL selected If the problem persists reinstall the CCL file 3 Can you get a normal dial tone with the modem Yes Go to the next step No Some voice mail systems use a beeping dial tone to notify the user of waiting messages which can affect the modem connection Open the modem control panel and select Ignore Dial Tone 4 Ifyou get an error message that the modem is not found verify that the modem card is installed and properly seated If the problem persists replace the modem card Make sure the correct driver is installed and the correct CCL is selected and that they are not corrupted If necessary reinstall the driver and or CCL If the problem persists reinstall the system software Enable only the Mac OS files in the Extensions Manager and any modem drivers needed If the problem persists reinstall the system software lol Troubleshooting Symptom Charts Modem Not Connecting 40 Error Launching a Browser Dialup Software Problem C
96. eyboard If the system still won t power on try connecting to a different AC outlet If the unit powers on this time you most likely have a problem with the AC outlet If you still have no power you will need to test for power at internal points inside the iMac At the Logic Board With the iMac placed with the CRT face down on a soft surface remove the bottom access cover and then remove the logic board mass storage chassis to access the logic board Note You will need a volt meter to test for power on the logic board Refer to the picture on the next page to locate the necessary test point referenced in the following procedure ol Troubleshooting General Testing for Power 5 Plug in the computer but leave the iMac powered OFF Ground the black probe on the volt meter by inserting it into the metal chassis With one hand behind your back touch the red probe on the volt meter to the positive lead of capacitor C28 on the logic board see the photograph on the next page to see if you have 5V on the logic board A 5V reading on the logic board means the power supply is providing the necessary trickle voltage to logic board Capacitor C28 Grounded Probe Testing for Power at the Logic Board ol Troubleshooting General Testing for Power 6 At the Power Supply to Power Filter Cable First remove the bottom access cover to reach the cables feeding into the logic board mass storage chassis Note You will need
97. f the disk cache remove or reduce the size of your RAM disk or turn on virtual memory For more information use Mac OS Help choose Help from the Finder s Help menu Note If you have both virtual memory and a RAM disk turned on in the Memory control panel don t set both of them at or near their maximum values Doing so can result in unpredictable or reduced performance by your computer A RAM disk uses random access memory or RAM as if it were a hard disk Turn off system extensions that you don t need using the Extensions Manager control panel See the information about the Extensions Manager control panel in Mac OS Help choose Help from the Finder s Help menu If you have installed system software additions from the Apple Extras folder you may want to remove them if you are not using them This software can decrease the amount of memory available for use by application programs To remove a system software addition run the system software Installer Follow the steps for a custom installation one of the choices is to Add Remove software For more information see Chapter 5 Reinstalling Your Computer s Software on page 53 If you frequently want to open more programs than memory allows you may want to install more random access memory RAM See the online documentation that came with your computer Computer freezes Your computer may be trying to complete a task but it s taking so long that it seems that
98. from a disc with Mac OS 8 1 or later You can t install or restore software Make sure your computer started up from the software install CD See Chapter 3 Starting Up From a CD on page 45 The Installer cannot repair your hard disk If you see a message that the disk can t be fixed because a file is open quit all programs If file sharing is on turn it off Then try installing again Use Disk First Aid or a third party disk repair utility to see if it can repair the disk Note Before using a disk utility from a manufacturer other than Apple see the documentation that came with the software or contact the software manufacturer to make sure the program is compatible with your computer and the version of Mac OS installed on your computer Apple cannot guarantee the performance of software from manufacturers other than Apple If you don t have a third party utility or if that utility can t repair the disk either you may need to reinitialize the hard disk See Initializing a Hard Disk on page 49 After you ve reinitialized the disk try installing the system software again The Installer cannot update the hard disk driver If you don t have an Apple brand hard disk or if you ve updated your Apple hard disk with a non Apple disk utility use that disk utility or the one supplied by the disk s manufacturer to update the drivers on your system Make sure to get the latest version of the utility Some ha
99. fyou can t repair the disk directory the System suitcase file or other resources may be damaged Perform a clean installation of system software see Chapter 5 Reinstalling Your Computer s Software on page 53 If that doesn t work reinitialize the hard disk see Initializing a Hard Disk on page 49 48 Chapter 4 Updating the Hard Disk Drivers Start up your computer from the software install CD See Chapter 3 Starting Up From a CD on page 45 Locate the Drive Setup icon and double click it to open the Drive Setup program Drive Setup In the list of drives click the disk you want to update Drive Setup List of Drives Yolume Name s Macintosh HD lt CD ROM drive gt Select a drive and then a function Initialize From the Functions menu choose Update Driver A message appears saying the new driver won t be available until you restart your computer Restart your computer See Restart the computer on page 12 Initializing a Hard Disk The hard disk inside your computer was initialized formatted for use at the factory so you should need to initialize it only if your hard disk is damaged and can t be repaired with Disk First Aid or another disk repair program You can initialize your internal hard disk using a program called Drive Setup which is on the software install CD that came with your computer Warning Initializing a disk erases all info
100. g the exposed power supply to avoid any shock hazard when working on an open unit You will need a volt meter to test for power on the power supply board Refer to the picture below to locate the necessary test points on the power supply Ground the black probe of a volt meter to the computer chassis Plug in the iMac but leave it powered OFF Then being careful not to short together any pins touch the red probe on the volt meter to pin 24 on the power supply board and test for 5V Grounded Probe Testing for Power at the Power Supply Board ol Troubleshooting General Testing for Power 8 Note The procedure below tests for 5 V on the Version 2 661 2167 power supply board First remove the top access cover and then remove the CRT EMI shield to reach the power supply board warning In this next procedure the power supply will be exposed and the unit plugged in Use extreme caution and avoid touching the exposed power supply to avoid any shock hazard when working on an open unit You will need a volt meter to test for power on the power supply board Refer to the picture below to locate the necessary test points on the power supply board Ground the black probe of a volt meter to the computer chassis Plug in the iMac but leave it powered OFF Then being careful not to short together any pins touch the red probe on the volt meter to pin 3 on the power supply board and test for 5V kra ai PN Eji ye ahi
101. hapter 3 Starting Up From a CD Open the System Folder Double click the System suitcase After the System suitcase opens close the suitcase and System Folder windows and restart your computer If this doesn t work then try the following Drag the System suitcase and Finder out of the System Folder Close the System Folder Put the System suitcase and Finder back into the System Folder If this doesn t solve your problem return to Problems on page 7 Make sure you re using the correct disk as a startup disk At least one disk drive must have system software on it from which the computer can start up Most computers have an internal hard disk that is used as the startup disk You can also use the software install CD to start up your computer m Make sure the correct disk is selected in the Startup Disk control panel If your computer is trying to start up from a CD that is not a startup CD it has no system software on it press the Open button on your CD ROM drive carefully pull out the tray and remove the disc Gently push the tray in and restart your computer Note If your computer started up from a CD the disc will not be automatically ejected when you shut down Restart the computer while pressing the Open button on the drive The tray should open so you can remove the disc If the tray won t open see the next section CD disc is jammed CD disc is jammed Ifa CD disc is jammed shut down y
102. he Service Parts Database and the wiring diagrams located in the Exploded View chapter The Analog Video Board 87 Ver 2 board is not backwards compatible and must be used with the other Ver 2 service parts Analog Video Board 88 Note The procedures for removing the two versions of the analog video board are very similar The following procedures are for the 661 2080 analog video board Before you begin discharge the CRT and remove the following e Lower access cover Main logic mass storage chassis Bottom rear housing e Front lower panel e Front outer bezel Top rear housing EMI shield lol Take Apart Analog Video Board 89 CRT Neck Video Board Gently pull the video board off the CRT neck Disconnect P301 P306 and the black ground wire on the video board Note Leave P302 P303 and the red wires connected to the video board Carefully pull the video board straight off the neck of the CRT lol Take Apart Analog Video Board 90 4 Remove the three screws on the analog board Important When replacing the analog board or the CRT be careful not to bump the factory set magnets located on the neck of the CRT Changing these settings may adversely affect the quality of the video and require you to replace the CRT lol Take Apart Analog Video Board 91 5 Disconnect P702 F508 Paid F503 PTOZ P505 P514 and P508 and a 4 pin
103. he items in the Apple System Profiler window mean choose Show Balloons from the Help menu Then point to the item you want to know about m The Create Report command in the File menu lets you create a customized report of system software information You can print this report by choosing the Print command from the File menu amp CTO Can t find it See also Mac OS Help s onscreen index Open the Help menu and choose Help then click the Index button Index A Administration password forgetting 40 Apple Assistance Center 05 66 AppleCD Audio Player 31 41 Apple Guide See Mac OS Help Apple System Profiler 66 application programs clean installation and 58 compatibility issues with older Macintosh programs 29 Disk First Aid 47 48 Drive Setup program 49 51 problems with 23 29 quitting 13 29 reinstalling individual applications 62 resetting PRAM and 19 restoring all original software 63 64 batteries replacing clock battery 38 replacing computer s backup battery 20 beep sound 8 20 39 blinking icon in menu bar 38 blinking question mark icon 8 bomb message 33 c CD ROM discs See also software install CD software restore CD cleaning 32 ejecting 30 32 46 jammed 17 30 problems with 30 33 42 starting up from 17 45 46 60 61 CD ROM drive 30 32 Chooser computer doesn t appear in 39 cleaning CD ROM discs 32 clean installation of system software 58 60 clock problems 38 control panels
104. henever you replace the CRT or the analog video board Cutoff 11 lol Adjustments o iMac H O HSE Monitor Geometry Color Color Depth Resolution Thousands Colors Millions 640 x 480 117Hz 800 x 600 95Hz 1024 x 768 75Hz Contrast and Brightness Cutoff Perform the cutoff adjustment prior to adjusting the white balance Make sure the monitor has been on for at least 10 minutes 1 Using the Monitors Control Panel set the contrast to maximum and brightness to midrange ia Adjustments Cutoff 12 2 Open the Display Adjustment Utility and select the 640 x 480 resolution from the Resolution Menu aesolution lt 640x480 600 x 600 1024 x 768 lol Adjustments Cutoff 13 3 Select the Color tab O Display Adjustment Utility H window and move the Sub Contrast and Sub Brightness controls to midrange Red Drive Green Drive Blue Drive Red Cutoff Green Cutoff Blue Cutoff Sub Contrast Sub Brightness lol Adjustments Cutoff 14 4 Set the drive and cutoff controls to their Display Adjustment Utility midpoint positions Note You will need to Red Drive switch back and forth between the Gray Bars E test pattern under the Blue Drive Pattern menu and the Color adjustment Red Cutoff window Green Cutoff Blue Cutoff Sub Contrast Sub Brightness fa Adjust
105. hub is a good example of a bus powered hub The maximum cable length allowed for 12 Mbps devices is 5m and the cable must be shielded The maximum cable length allowed for 1 5 Mbps devices is 3m and the cable is typically unshielded New Technologies 28 Installing and Using a USB Device on a USB Capable Mac OS Computer Carry out the following steps to install and use a USB device on a USB capable MacOS computer 1 Make sure your device is Mac OS approved Although USB devices should all conform to the USB specification some developers devices do not follow spec As a result they need specially written drivers Also the current version of Mac OS support for USB does not yet support USB devices like microphones and speakers In any case customers should purchase only USB devices that have the Mac OS seal of approval If necessary run the installer for the device driver Check the instructions that came with the device for details 3 Provide external power if needed for the device Check New Technologies 29 the instructions that came with the device for details Plug the device in to an available hub port The device should be sensed automatically the driver should automatically load and the device should then be ready for use When you are finished using the device you can leave it plugged in or unplug it to free up the port New Technologies 30 Features Modem 31 Modem The i
106. if an updated version is available Tip A recently installed extension or control panel might be the problem If you have a lot of extensions and control panels you may want to work by halves Turn on half the extensions and control panels and test for the problem If the problem disappears repeat the process turning on half of the remaining items If the problem persists repeat the process turning off half of the items that are turned on Continue to work by halves like this until you locate the conflicting extensions or control panels If this doesn t solve your problem return to Problems on page 7 Reset the PRAM Your computer stores information in an area of memory called parameter RAM PRAM Resetting the PRAM replaces the information stored there with the default original settings Important Some system preferences are stored in PRAM Third party software programs may also store information in PRAM When you reset the PRAM some of these preferences are lost Make sure you make a note of the settings before you reset PRAM Resetting PRAM may affect the settings in some of your control panels including the following a Date amp Time Memory information lost includes RAM disk settings Monitors amp Sound Keyboard and Mouse or Trackpad m AppleTalk Connect via is set to the Ethernet port a Map Note You may also have to restore modem settings in any communications software programs you are
107. ile low speed 1 5 Mbps may not Each connector has four pins two for power and two for data lol Basics New Technologies 18 COMPUTER USB HOST UPSTREAM DOWNSTREAM Figure 2 Defining Upstream Downstream Terms New Technologies 19 Benefits of USB Technology The advantages of USB technology include hot swapping capability auto configuring and ease of use For example with just one available USB socket a customer could plug in a scanner scan a photo unplug the scanner then plug in a printer print that photo unplug the printer then plug in a modem e mail the photo to a friend unplug the modem then plug in a storage drive backup the photo file unplug the drive all without having to restart the host computer or even go into sleep mode USB also provides a faster connection and a larger number of ports than ADB or serial options ia Basics New Technologies 20 How a USB Device is Installed and Used A USB network is made up of the following components An operating system that supports USB Both iMac and Windows 98 support USB A host typically a controller chip set residing in the personal computer controls the USB system and allocates bandwidth per device There is only one host per USB network and as such USB is designed for connecting peripherals to the computer not computers or hosts to each other This explains why USB will not replace local area networking fo
108. ility The graphics subsystem features an industry standard SGRAM SO DIMM connector in addition to 2 MB of S RAM soldered to the logic board The SGRAM SO DIMM can accommodate SO DIMM sizes of 2 MB and 4 MB for a total SGRAM capacity of 6 MB Sound 39 Sound The 16 bit stereo audio circuitry provides high quality sound input and output through the built in microphone and speakers The user can also connect external input and output devices by way of the sound input and output jacks The sound system supports sample sizes up to 16 bits at a sample rate of 44 1 kHz Sound Input 40 Sound Input The sound system accepts inputs from three possible sources e Built in microphone External stereo sound input jack Sound from internal CD player Sound Output 41 Sound Output The sound system sends computer generated sounds to the built in speakers the sound output jack and the headphone jacks The sound system provides user selectable SRS 3D stereo enhancement Video Display 42 Video Display The built in video display uses a 15 inch CRT and supports three resolutions The table below lists the resolutions and pixel depths supported with the standard 2 MB of SGRAM and with expanded SGRAM Resolution 640 x 480 Vertical rate 117 233 Hz e Pixel depth 2 MB SGRAM 32 bits Pixel depth 4 or 6 MB SGRAM 32 bits Resolution 800 x 600 Vertical rate 94 97 Hz Pixel depth
109. ill visible on the screen so that some of your work will be easy to replace If this doesn t solve your problem return to Problems on page 7 Wake up your computer If your screen is dark a screen saver program may have darkened your screen or the computer may have gone to sleep to save energy because it was inactive If the power button on the front of your computer is amber your computer is asleep Turn off the screen saver or wake up your computer by pressing any key or moving the mouse You may want to adjust the settings in the Energy Saver control panel to determine when your screen and computer go to sleep See the information about the Energy Saver control panel in Mac OS Help choose Help from the Finder s Help menu If this doesn t solve your problem return to Problems on page 7 Problems Starting Up 11 12 Chapter 1 2 Restart the computer Often you can eliminate a problem simply by restarting your computer which clears the computer s memory Always try restarting the proper way If you can save any open documents before restarting Open the Special menu and choose Restart Note You can also press the power button on your Apple USB keyboard or on the front of the computer A dialog box appears Are you sure you want to shut down your computer now Car 500 Cance unom Click Restart If the computer freezes Try quitting open applications See Qui
110. ion menu and then click the window you want or choose the program from the Application menu Can t quit program opened from Launcher Some programs in the Learning section of the Launcher when you press the Learning category button are self running demos If you can t get out of one of the programs or demos try the following Look again to see if you can find a Quit button or other quitting option Hold down the Command 88 key on your keyboard and while holding it down press the period key a While holding down the Command 8 key on your keyboard press the Q key Press the power button on your Apple USB keyboard or on the front of your computer then press Return to shut down the computer m Restart your computer by holding down the Command 88 and Control keys while you press the power button on your Apple USB keyboard or on the front of the computer Problems With Hard Disks CDs and Other Storage Media Problems With Hard Disks Only one document called Where have all my files gone appears on the hard disk If no files appear on the hard disk except for a single document called Where have all my files gone you started up your computer from a CD with system software earlier than Mac OS 8 1 To see the contents of your disk you must start up your computer from a disk with Mac OS 8 1 or later Problems Using Your Computer 29 30 Chapter 2 Can t mount Mac OS DOS or ProDO
111. ip and Resetting the Logic Board earlier in this chapter for instructions Do you hear a normal boot chime at startup Yes Go to next step No Follow these steps to resolve the problem 1 Reseat the SDRAM 2 Reseat the processor module 3 Replace the processor module 4 Replace the logic board Verify that the following cables are attached securely Internal RGB cable that attaches to the A V interconnect board at J5 Internal video cable that attaches to the logic board at J16 and the A V interconnect board at J2 Internal RGB cable that attaches to the video portion of the analog video board at board at P301 Replace the analog video board Exchange like for like there are two versions of the board Replace the internal video cable that attaches to the logic board at J16 and the A V interconnect board at J2 Replace the A V interconnect board Replace the logic board Replace the internal RGB cable that connects at the A V interconnect board at J5 and the analog video board at P301 10 Replace the CRT lol Troubleshooting Symptom Charts Video Problems 19 Solid gray screen however normal startup boot chime power LED on and the fan is running 1 10 11 12 Reset parameter RAM Hold down lt Command gt lt Option gt lt P gt lt R gt during startup Check that video USB cable connections are secure between monitor adapter and computer Boot off the system CD that came with the unit Do
112. l Take Apart Processor Shield Frame 1 Remove the one screw that holds the shield frame to the logic board 2 Unhook the tabs that attach the shield frame to the logic board This may require jiggling the shield frame back and forth to unhook the tabs Note Remove the processor shield frame the processor top shield the processor card the modem and modem standoff before returning the logic board to Apple lol Take Apart CD ROM 32 CD ROM Before you begin remove the following e Lower access cover e Logic board mass storage chassis Important Apple recently 7 99 released a new 24x CD ROM drive service part for five color iMacs with 266MHz processors or faster only Please note that this new 24x CD ROM called the Version 2 is not compatible with the 24x CD ROM drive in the CD ROM 33 233MHz Bondi Blue iMacs Although the two iMac CD ROM drives are identical in fit and performance the drives are not interchangeable The 24x CD ROM Version 2 may cause data loss if used in the 233MHz Bondi Blue iMac To ensure proper compatibility please order the correct CD ROM drive when servicing an iMac fa Take Apart CD ROM 34 CD ROM Part Numbers If you are replacing a 24x CD ROM drive in a Bondi Blue iMac 233MHz order the 661 2076 CD ROM drive If you are replacing a 24x CD ROM drive in a five color iMac 266MHz or greater order 661 2207 CD ROM drive
113. lainTalk Microphone that comes with some Macintosh computers The sound input port also supports a standard stereo miniplug to RCA cable adapter for connecting stereo equipment to your computer Clock Calendar featuring CMOS custom circuitry with long life battery Fan speed thermally controlled Energy Saver control panel Built in 2D and 3D hardware graphics acceleration via ATI Rage llc graphics controller ASIC Model Comparison 5 Model Comparison 233 MHz and 266 MHz iMac Models The following information describes the main features of the 233 MHz and 266 MHz iMac models Note Apple regularly makes modest design improvements to products during their life cycles These changes may include minor changes to the logic board or additions in the bundled software Bonal Blue w IrDA M6709LL A OS Software Mac OS 8 1 e ProcessorSpeed 233 MHz Reset Procedure Reset Button on Side Standard SGRAM 2 MB SGRAM Built in Hard Drive 4 GB Graphic Chip ATI Rage 110 Model Comparison 6 Bondi Blue no IrDA M6709LL B OS Software Mac OS 8 5 ProcessorSpeed 233 MHz Reset Procedure Front Power Button Standard SGRAM 2 MB SGRAM Built in 4 MB SGRAM DIMM Hard Drive 4 GB Graphic Chip ATI Rage Pro Blueberry no IrDA M7345LL A OS Software Mac OS 8 5 1 ProcessorSpeed 266 MHz Reset Procedure Front Power Button Standard SGRAM 2 MB SGRAM Built in 4 MB SGRAM DIMM Hard Drive 6 GB Graphi
114. lashing box appears Try these solutions a Re bless the System Folder p 16 a Test and repair the hard disk directory p 21 Reinstall system software p 21 Large folder shaped areas containing pictorial buttons appear Try this solution m Make sure you re using the correct disk as a startup disk p 16 Hard disk icon doesn t appear on desktop This is what a typical Macintosh HD bard disk icon looks like Try these solutions m Restart the computer p 12 Make sure external devices are properly connected and turned on p 14 m Test and repair the hard disk directory p 21 Computer starts up from wrong disk Try these solutions Make sure external devices are properly connected and turned on p 14 a Make sure you re using the correct disk as a startup disk p 16 m Reset the PRAM p 19 m Test and repair the hard disk directory p 21 Solutions Take notes If you see an error message or the screen freezes you don t have to take action immediately First note the following information m the error message and numbers if any what you were doing when the problem occurred m the programs you were using software you have installed recently especially items that have been added to the System Folder clues on the screen is a menu selected What programs and document icons are open anything else that seems relevant If you were typing text write down any text st
115. lor window to save your settings Proceed to the White Balance adjustment fa Adjustments Cutoff 20 ie Help Gray Bars Black White Red Green Blue White Grid Black Grid Focus White Balance Make sure the cutoff is set correctly before you proceed and that the monitor has been on for at least 10 minutes 1 Open the Display Adjustment Utility and select the Gray Bars test pattern from the Pattern menu Cutoff 21 lol Adjustments Oo Display Adjustment Utility Red Drive Green Drive Blue Drive Red Cutoff Green Cutoff Blue Cutoff Sub Contrast Sub Brightness Hold a light meter on the white bar last bar on the right Adjust the red green and blue drive controls until the light meter reads one of the following 18 foot candles on light meter R77 18 foot candles on light meter L246 e Middle of 9 on the 1 through 10 scale of light meter Model L 248 Note The drive controls adjust the lighter bars Cutoff 22 Important If a predominant color is displayed in the three left gray bars adjust the cutoff controls until you see no predominant color Recheck the white bar until you get one of the meter readings mentioned on the previous page Adjust the red green and blue drive controls until there is no predominant color and the meter reading is within the specified range Cutoff 23 ati Help Gray Bars Black White Re
116. lots The bottom slot contains the pre installed 32 MB SO DIMM The top slot is user installable If a customer orders extra RAM via the build to order BTO program that RAM will be installed in the upper slot This means that a customer may get their iMac with both RAM slots populated In addition end users are permitted to install upgrade their own RAM on the iMac computer Therefore you should not assume there is a free RAM slot in the customer s computer Memory 47 Maximum SDRAM supported 233 MHz A iMac Maximum size supported is 64 MB per slot totaling 128 MB This can be achieved by installing a 64 MB module in the upper slot and a 64 MB module in the lower slot 233 MHz B iMac Maximum size supported 16128 MB per slot totaling 256 MB This can be achieved by installing a 128 MB module in the upper slot and a 128 MB module in the lower slot 266 MHz iMac Maximum size supported 16128 MB per slot totaling 256 MB This can be achieved by installing a 128 MB module in the upper slot and a 128 MB module in the lower slot 333 MHz iMac Maximum size supported 16128 MB per slot totaling 256 MB This can be achieved by installing a 128 MB module in the upper slot and a 128 MB module in the lower slot Memory 48 The lower RAM expansion slot will only accommodate SO DIMMs that are 1 0 inch to 1 5 inches in height A 2 0 inch DIMM will not physically fit into the slot and cannot be used If a 128 M
117. maximum values Doing so can result in unpredictable or reduced performance by your computer A RAM disk uses random access memory or RAM as if it were a hard disk If you still do not notice an improvement you may want to reinstall system software on your startup hard disk See Chapter 5 Reinstalling Your Computer s Software on page 53 If you typically use several application programs at the same time your computer s performance will increase if you install more random access memory RAM See the online documentation that came with your computer Remove unused fonts from the Fonts folder in the System Folder Test and repair the hard disk See Chapter 4 Testing and Repairing Your Hard Disk Directory on page 47 Computer isn t performing well If after trying the tips in the previous section your computer still isn t performing as fast as you d like try these suggestions Each one will make only a small difference in your computer s speed but if you try them all you ll notice the improvement 36 Chapter 2 Open the Memory control panel in the Control Panels folder in the Apple menu then make these changes a Inthe Disk Cache section increase the Cache Size slightly Because the amount of memory available for opening programs decreases as you increase the size of the cache do not set the Cache Size too high a Inthe Virtual Memory section click Off if you haven t already done so Ope
118. ments Cutoff 15 ui Help Gray Bars Black White Red Green Blue White Grid Black Grid Focus Select the Gray Bars test pattern from the Pattern menu Note This procedure should be performed in a dimly lit room Important If any color adjustments are turned down too far and the screen goes completely dark press the Command R keystroke combination to revert the color adjustment to the last saved setting lol Adjustments Cutoff 16 Look at the Gray Bar Test pattern e The bars should have no predominant color The leftmost bar should be as black as the screen border e The second bar from the left should be barely visible e The third bar should be dark gray lol Adjustments Cutoff 17 7 Adjust the red green 0 Display Adjustment Utility SS and blue cutoff controls until the second bar from the left is barely visible Red Drive Green Drive Blue Drive Red Cutoff Green Cutoff Blue Cutoff Sub Contrast Sub Brightness lol Adjustments Cutoff 18 8 Check the Gray Bar test pattern If there is a predominant color in the three gray bars on the left adjust the color accordingly until there is no predominant color lol Adjustments Cutoff 19 9 The cutoff is now set correctly You should see shades of black and gray and the second bar from the left is barely visible Click the Save button in the Co
119. multi color CRT cable not shown Don t disconnect P506 and P502 the two gray cables Replacement Note P506 and P502 gray cables shown should be returned with the board if the board is faulty E i alt 1 Foul Take Apart Analog Video Board Ver 2 92 Analog Video Board Ver 2 Awarning This product contains high voltage and a high vacuum picture tube To prevent serious injury review CRT safety in Bulletins Safety Note There are two versions of the analog video board Identify which version you have before replacing a module Exchange like for like Refer to the Service Parts Database and the wiring ia Take Apart Analog Video Board Ver 2 93 diagrams for the analog video and power supply boards located in the Exploded View chapter The Ver 2 board is not backwards compatible and must be used with the other Ver 2 service parts Analog Video Board Ver 2 94 lol Take Apart The following procedure is for the 661 2166 Ver 2 analog video board Before you begin discharge the CRT and remove the following Lower access cover Main logic mass storage chassis Bottom rear housing Front lower panel Front outer bezel Top rear housing EMI shield lol Take Apart Analog Video Board Ver 2 95 CRT Neck Video Board a Gently pull the video board off the CRT neck Disconnect P301 P305 and the black ground wire
120. n in violation of federal and state laws Every effort has been made to ensure that the information in this manual is accurate Apple is not responsible for printing or clerical errors ple Computer Inc Infinite Loop upertino CA 95014 2084 8 996 1010 ttp www apple com 2 p ple the Apple logo AppleShare AppleTalk LaserWriter Mac the Mac OS logo Macintosh Power Macintosh uickDraw and QuickTime are trademarks of Apple Computer Inc registered in the U S and other countries gt OD pleCD At Ease Disk First Aid Extensions Manager Finder Foreign File Access and Macintosh PC Exchange are trademarks of Apple Computer Inc ENERGY STAR is a U S registered trademark Helvetica is a registered trademark of Linotype Hell AG and or its subsidiaries PostScript is a trademark of Adobe Systems Incorporated or its subsidiaries and may be registered in certain jurisdictions PowerPC and the PowerPC logo are trademarks of International Business Machines Corporation used under license therefrom SRS and the SRS symbol SRS C are registered trademarks of SRS Labs Inc in the United States and selected foreign countries SRS technology is incorporated under license from SRS Labs Inc and is protected under United States Patent Nos 4 748 669 and 4 841 572 with numerous additional issued and pending foreign patents Purchase of this product does not convey the right to sell recordings made with the SRS techn
121. n the Keyboard control panel in the Control Panels folder then make these changes Set the Key Repeat Rate to Fast a Set the Delay Until Repeat to Short If you don t need to see thousands or millions of colors on the screen reduce the color depth Open the Monitors amp Sound control panel in the Control Panels folder then select 256 in the Color Depth section Increase the speed of mouse tracking Open the Mouse control panel in the Control Panels folder then set Mouse Tracking to Fast Make sure your computer is not calculating folder sizes Choose View Options in the View menu Make sure the checkbox next to Calculate folder sizes is not selected Note Calculate folder sizes is only available when as List is selected in the View menu Test and repair the hard disk See Chapter 4 Testing and Repairing Your Hard Disk Directory on page 47 3D rendering doesn t seem to be accelerated The performance advantage of any 3D accelerator depends on the type of scene being rendered Some applications may show the benefits of acceleration more than others Check the following items Set your screen to a lower resolution the lowest resolution is 640 x 480 and reduce the number of colors The online documentation that came with your computer may provide additional information about the video modes resolution and color depth that support 3D acceleration Make sure that your application uses QuickDraw 3D
122. n the program you want to use Note Make sure you have quit other applications not just closed their open documents To quit an application open the application menu at the far right of the menu bar and choose the application name to make the application active Then open the File menu and choose Quit m Follow these steps to allocate more memory to the program 1 Choose About This Computer from the Apple menu Take note of the number in the Largest Unused Block section This number tells you how much memory is available to open programs 2 Quit the program if it s open select its icon and choose Get Info from the File menu Take note of the numbers in the Minimum Size and Preferred Size boxes 23 24 Chapter 2 3 Ifthe number in the Minimum Size box is larger than the largest unused block not enough memory is available to use this program To free memory quit open programs or restart the computer You can also type a smaller number in the Minimum Size box if you want to open the program using less memory But some programs don t work well if you assign them less memory 4 Ifthe number in the Preferred Size box is smaller than the largest unused block you may need to assign more memory to the program A program may need more memory if you are working with complex documents Type a larger number in the Preferred Size box Try increasing the number in increments of 200 Use the Memory control panel to reduce the size o
123. nd try again If the problem persists reset the logic board See The CUDA Chip and Restarting the Logic Board earlier in this chapter for instructions Do you have power to the system now Yes Run diagnostics No Go to next step 5 Possible bad logic board or power headphone board Check for trickle power on the logic board Is there 5V power Yes Replace the logic board If problem persists replace the power headphone board No Check for trickle power at the power supply to power filter cable Is there 5V power Yes Replace the logic board If problem persists replace the power filter board No Go to next step 6 Possible bad power supply to power filter board cable Check for trickle power at the power supply board Is there 5V power lol Troubleshooting Symptom Charts Video Problems 18 No video the screen is either completely black or you will see horizontal rolling lines There will be power to the system however which is evidenced by an illuminated amber LED and a running fan Yes Replace the power supply to power filter cable No Go to next step 7 Possible bad power supply board Replace the power supply board Video Problems Reset parameter RAM Hold down lt Command gt lt Option gt lt P gt lt R gt during startup but before Welcome to Macintosh appears Reset the CUDA chip and try again If the problem persists reset the logic board See The CUDA Ch
124. ne open this pop up menu and select the appropriate option Select Mac 0S 8 1 features to install Selection Feature oO Universal System for any supported computer 49 497K System Software for this computer 36 477K Oo Core System Software 11 235K D D C Compatibitity 464K D C Mobitity 1 975K D gt C Multimedia 6 045k b Oo Networking amp Connectivity 5 308k LLI gt Printing 6 327k Selected size zero K Cancel Scroll through the list of components and click the checkbox next to each component you want to install or remove You can see and select individual items within each component by clicking the arrow to the left of the component then clicking the item you want to install For more information about each component listed click the box with the letter i in it to the right of the component When you re finished choosing components click OK Repeat steps 2 4 for all the software products you want to install or remove If you want to update the hard disk drivers and create an installation report click Options In the window that appears click the appropriate checkboxes then click OK Click Start A window appears showing the status of the installation or removal process If you see messages about problems with your hard disk see Problems During Installation on page 60 When a message appears saying that the installation process finished click Quit
125. nfrared technology for easy wireless LAN access and file sharing with similarly equipped systems The iMac logic board has one IrDA Infrared Data Association compliant connector that offers a maximum transfer speed of 4 MB sec AppleTalk and TCP IP The iMac also allows users to switch to the IRTalk protocol by using the Infrared Control Panel The iMac can therefore communicate with other IRTalk capable devices such as Macintosh PowerBooks using the IRTalk protocol at a speed of 230 kB second AppleTalk Only For information about whether or not iMac computers can communicate with HP printers contact Hewlett Packard New Technologies 11 For information about whether iMac computers can communicate with other third party IrDA compliant devices contact the manufacturer of the third party device The iMac supports the following Apple devices on the IrDA channel PowerBook 2400 and 3400 Macintosh Powerbook G3 IrDA vs IRTalk There are two main differences between IRTalk and IrDA 1 IrDA is an industry standard while IRTalk is an Apple only technology 2 IrDA supports TCP IP and AppleTalk whereas IRTalk only supports AppleTalk The Infrared Control Panel gives information about any New Technologies 12 Infrared connections that are established as well as what type of infrared the iMac is currently set to use For infrared options to work there are three drivers that must be in the Control Pan
126. ng to Messages About Your Hard Disk The Mac OS 8 1 Installer checks the destination hard disk for errors before installing the software Additionally if your hard disk was formatted with an Apple disk utility program the Installer updates the hard disk drivers with the latest version of the driver software If your disk drives are formatted with a disk utility from another company the drivers are not updated You should use the third party disk utility to update your hard disk before installing Mac OS 8 1 Note Before using a disk utility from a manufacturer other than Apple see the documentation that came with the software or contact the software manufacturer to make sure the program is compatible with your computer and the version of Mac OS installed on your computer Apple cannot guarantee the performance of software from manufacturers other than Apple Reinstalling Individual Applications If you re having problems with an application or it was damaged or inadvertently erased try reinstalling that application If an application came with its own CD see the software documentation or the Read Me document on that CD for instructions on how to reinstall that software If not see the Read Me document on the software install CD for instructions on how to reinstall that software Important If you have preferences or settings for individual applications make a note of them so you can easily reset them if necessary after you install system sof
127. nsions in the Selected Set pop up menu so that you can return to it later if you want Open the Selected Set pop up menu and choose the Mac OS 8 1 base set This makes the computer start up using only the software installed at the factory Click the Continue button to continue startup When the computer is ready try the same actions that caused the problem If the problem no longer occurs you probably have one or more extensions or control panels that don t work with Mac OS 8 1 Continue with the steps that follow in Test Individual Extensions and Control Panels Test individual extensions and control panels Restart your computer while holding down the Space bar Release the Space bar when the Extensions Manager control panel opens Click the Duplicate Set button to create a new set In the window that appears type a name for the set for example Test Set and click OK Turn off all the extensions in the new set by choosing All Off in the Edit menu Turn on the item you want to test by clicking its checkbox Click the Continue button to continue startup Try the same actions that caused the problem If the problem occurs again the item is probably incompatible Remove the item from the Extensions folder or turn the item off using the Extensions Manager Repeat steps 1 through 7 for each item you want to test If you find that a piece of software is incompatible contact the manufacturer of the software to see
128. nt inner bezel To remove the top rear housing hold the housing near the bottom and pull the housing up to unhook the tabs from the tab holes start on one side Then pull the sides out and back to release the entire top rear housing see the next graphic lol Take Apart Top Rear Housing 83 6 Lift the top rear housing off the computer Top Rear gt Housing lol Take Apart EMI Shield 84 Shield EMI Shield Awarning This product contains high voltage and a high vacuum picture tub Review CRT safety in Bulletins Safety Before you begin discharge the CRT and remove the following e Lower access cover Main logic mass storage chassis Bottom rear housing e Front lower panel e Front outer bezel Top rear housing EMI Shield 85 lol Take Apart Screws 1 Remove the ten screws on the EMI shield 2 Pull out and up on the EMI shield to remove it from the chassis Replacement Note Position the tabs on the top of the the EMI shield first then line up the remaining screws holes Take Apart Analog Video Board 86 Analog Board Analog Video Board warning This product contains high voltage and a high vacuum picture tube To prevent serious injury discharge the CRT Note There are two versions of the analog video board Identify which version you have before replacing a module Exchange like for like Refer to t
129. ntation that came with your computer To find out more about your USB device see the documentation that came with the device Problems Printing If you re using a USB printer see also Problems With USB Devices on page 33 Note Also refer to the documentation that came with the printer Check your printer settings in the Chooser in the Apple menu making sure you have selected the correct printer a Turn off the computer and printer and check the printer cable connections If none of these suggestions solves the problem you may need to reinstall the printer software that came with your printer Refer to the documentation that came with your printer Can t print or error message appears a There may not be enough memory for printing Try the following a Try quitting other open applications m Immediately after sending the Print command quit the application you re printing from to free memory for printing m Increase the amount of memory for the desktop printer icon select it choose Get Info from the File menu and type a larger number in the Preferred Size box Reduce the amount of memory used by the application you re printing from If your document uses lots of fonts choose Page Setup from the File menu Make sure you have selected Unlimited Downloadable Fonts under PostScript Options If that doesn t work use fewer fonts in the document Ifthe document contains complex graphics rem
130. ntation that came with your computer If you suspect a mouse problem clean your Apple USB mouse as described in the online documentation that came with your computer Then plug the mouse into an open USB port on your computer If the mouse works then you may have a problem with the keyboard If the mouse doesn t work borrow an Apple USB mouse from another computer and connect it to yours If that solves the problem you may need to repair your mouse Consult an Apple authorized service provider If you suspect a keyboard problem borrow an Apple USB keyboard from another computer and connect it to yours If that solves the problem you may need to repair your keyboard Consult an Apple authorized service provider For non USB devices Shut down your computer by pressing the power button on your Apple USB keyboard or on the front of the computer When a dialog box appears click Shut Down Make sure all external devices are properly connected make sure connectors are plugged in all the way and turn on the devices Then restart your computer m If that doesn t solve your problem shut down your computer again Turn off and disconnect all external equipment except your keyboard and mouse Then restart the computer To determine which piece of equipment may be causing the problem reconnect one device start up your computer and make sure the device is operating correctly Then shut down the computer Continue reconnecting devices one
131. ntrolled via the Display Adjustment Utility 5 Open the Display Adjustment Utility and select the Geometry window 6 Adjust the geometry settings by moving the appropriate slider bar 7 When done save your adjustments Geometry 9 Resolution 640 x 480 800 600 1024 x 768 Saving Geometry Settings for Multiple Resolutions Important 10 order to save a set of adjustments in the for a specific resolution click the Save button To adjust another resolution select a different resolution from the Resolution menu Make the adjustments click the Save button and repeat the sequence for the next resolution If you do not save the adjustments from one resolution before switching to a new resolution a dialog box will appear asking if saving is desired before switching resolutions If yes is selected adjustments will be saved and the resolution change will occur If no is selected the adjustments will not be saved however the resolution change will occur Note Don t use the Control Strip or Monitors control panel to set the resolutions Adjustments Video 10 Oo Red Drive Green Drive Blue Drive Red Cutoff Green Cutoff Blue Cutoff Sub Contrast Sub Brightness Display Adjustment Utility Video Use the Display Adjustment Utility to perform the Cutoff and White Balance adjustments Perform the cutoff and white balance adjustments w
132. ology Simultaneously published in the United States and Canada Mention of third party products is for informational purposes only and constitutes neither an endorsement nor a recommendation Apple assumes no responsibility with regard to the performance or use of these products Contents Problems Starting Up 7 Problems 7 Computer won t start up restart or shut down 7 Single icon appears in middle of screen 8 Computer beeps 8 Computer freezes 8 Message appears 9 Normal desktop doesn t appear 10 Hard disk icon doesn t appear on desktop 10 Computer starts up from wrong disk 11 Solutions 11 Take notes 11 Wake up your computer 11 Restart the computer 12 Force your computer to restart 12 Shut down the computer 12 Force your computer to shut down 13 Quit open applications 13 Make sure your computer is getting power 13 Make sure the screen is properly adjusted 13 Make sure external devices are properly connected and turned on 14 Check RAM disk settings in the Memory control panel 15 Increase the memory available for system software 15 Reset the window display 16 4 Contents Re bless the System Folder 16 Make sure you re using the correct disk as a startup disk 16 CD disc is jammed 17 Resolve system extension conflicts 17 Reset the PRAM 19 Make sure memory is installed correctly 20 Replace the computer s backup battery 20 Test and repair the hard disk directory 21 Reinstall system soft
133. on the video board Note Leave P302 the red wire and P303 the gray cable connected to the video board Carefully pull the video board straight off the neck of the CRT lol Take Apart Analog Video Board Ver 2 96 4 Remove the three silver screws on the analog board Important When replacing the analog board or the CRT be careful not to bump the factory set magnets located on the neck of the CRT Changing these settings may adversely affect the quality of the video and require you to replace the CRT Analog Video Board Ver 2 97 lol Take Apart nalog ideo Board Rev 2 5 Tilt the analog board out and disconnect six cables P702 P504 P514 P703 P506 and P701 Replacement Note This board should have two cables on it when returned to Apple the red permanent cable that connects the analog and video board and the gray cable that goes from P303 on the video board to P703 on the analog board lol Take Apart Power Supply Board 98 Power Supply Board Awarning This product contains high voltage and a high vacuum picture tube To prevent serious injury discharge the CRT Note There are two versions of the power supply board Identify which version you have before replacing a module Exchange like for like Refer to the Service Parts Database and the wiring diagrams for the analog video and power supply Power Supply Board 99 boards located in th
134. ons Manager control panel 15 17 18 external devices troubleshooting 14 15 32 35 F G files deleting 28 DOS 28 Finder file 62 font file 38 locked files 28 62 missing 27 29 61 problems with 27 28 32 33 System file 61 62 unlocking 28 62 Where have all my files gone file 29 Windows 28 file sharing 28 31 32 39 41 File Sharing control panel 28 31 32 39 40 Finder file 62 font file 38 fonts reinstalling after clean installation 59 software problems and 26 forced quit applications 13 forced restart 12 forced shutdown 13 Foreign File Access 30 formatting disks 30 50 frozen system during shutdown 13 during startup 9 before Welcome to Mac OS appears 8 9 while restarting computer 12 while using computer 9 24 while using Photo CDs 33 hard disk computer starts up from wrong disk 11 16 erasing with software restore CD 64 icon missing from desktop 10 initializing 49 50 Mac OS Extended format and 50 messages about 62 missing files on 27 29 61 problems with 29 3C 61 62 repairing corrupted data on 47 48 61 starting up from external hard disk 16 testing 50 51 updating drivers on 49 61 headphones 41 42 help Apple Assistance Center 65 66 Apple support Web site 22 65 Mac OS Help 22 Mac OS Info Center 22 High Sierra CD ROM discs 32 33 I J icons blinking icon in menu bar 38 blinking question mark icon 8 CD ROM icon doesn t appear on desktop 30 31 33 hard disk icon missing 10 icon with X in
135. ore information see the documentation that came with your device m Make sure you ve installed the necessary software to use the device USB devices use software called drivers that allow your computer to check the device when it s connected to make sure it gets enough power and speed Some software drivers are already available on your computer in the Mac OS However with some devices you may need to install the software drivers For more information see the documentation that came with your USB device Ifyou suspect a mouse problem clean your Apple USB mouse as described in the online documentation that came with your computer Then plug the mouse into an open USB port on your computer If the mouse works then you may have a problem with the keyboard If the mouse doesn t work borrow an Apple USB mouse from another computer and connect it to yours If that solves the problem you may need to repair your mouse Consult an Apple authorized service provider Ifyou suspect a keyboard problem borrow an Apple USB keyboard from another computer and connect it to yours If that solves the problem you may need to repair your keyboard Consult an Apple authorized service provider m Make sure the cables on your device are not damaged or frayed If so contact the manufacturer of the device or see the documentation that came with the device For more information To find out more about USB and your computer see the online docume
136. ory available to your programs You turn on virtual memory in the Memory control panel See the information about the Memory control panel in Mac OS Help choose Help from the Finder s Help menu The program isn t requesting as much memory as it needs Use the program s Get Info window to give it more memory See Message appears saying there s not enough memory on page 23 The program may be damaged or it may not be compatible with Power Macintosh technology Check to make sure the software is PowerPC compatible See the program s documentation or contact the manufacturer or vendor Make sure you install the software from a known good source such as the original program disks Check that the program is compatible with the version of system software that you are using See the program s documentation or contact the manufacturer or vendor You may need an updated version of the software Contact the software manufacturer for more information Application won t open because a file can t be found Macintosh programs designed specifically for the PowerPC microprocessor also called native applications use special files called shared libraries Any necessary shared libraries should be installed automatically when you install these special Macintosh programs Follow the directions that came with your program to reinstall it If the shared library is still missing contact the software program s manufactu
137. osh disk Do you want to initialize it message appears Make sure that the Foreign File Access extension is installed and turned on Use the Extensions Manager control panel in the Control Panels folder in the Apple menu to turn it on then restart your computer Make sure the CD ROM software is installed The CD ROM software is already installed on Macintosh computers that come with CD ROM drives The easiest way to install CD ROM software is by reinstalling your system software See Chapter 5 Reinstalling Your Computer s Software on page 53 Restart your computer after reinstalling system software The disc may use a format that the Macintosh cannot recognize Ask the disc s manufacturer for a disc that a Macintosh can recognize Computer ejects disc unexpectedly Make sure the disc is lying flat in the tray and the disc label is facing up Important 11 you re using a small 8 cm disc make sure it s centered within the tray s inner ring and the computer is absolutely level An improperly seated small disc in your computer may result in damage to the disc the CD ROM drive or both The disc may need to be cleaned See the online documentation that came with your computer If there are visible scratches on the shiny side of the disc you may be able to remove them with a CD ROM disc polishing kit available from your audio CD dealer If the scratches can t be removed you need to replace the disc The dis
138. our computer Locate the small hole near the disc drive s opening and carefully insert the end of a large straightened paper clip Push gently until the CD tray opens then pull out the tray and remove the disc Do not use excessive force If this doesn t solve your problem return to Problems on page 7 Resolve system extension conflicts If your computer does not start up properly or behaves erratically you may have an extension or control panel that is not compatible with another extension or control panel or with an application or system software Verify the problem To verify that you have a compatibility problem 1 Start up your computer while holding down the Space bar This opens the Extensions Manager control panel 2 Release the Space bar when the Extensions Manager control panel opens Oo Extensions Manager Selected Set Mac 0S 8 1 all ls Version Control Panels 5 184K E Appearance 240K 1 0 1fic2 Mac 05 8 Apple Menu Options 56K 1 1 3 Mac 0S 8 0 eal AppleTalk 216K 1 1 Open Tran Cache Switch 8K 7 0 1 Mac 05 8 0 E ColorSync m Profile 16K 2 1 Mac 05 8 0 Date amp Time 80K 8 0 1b5 Mac 05 8 z Desktop Pictures 832K 1 0 1 Mac 05 8 4 File Sharing 640K 8 0 Mac 05 8 0 Ss General Controls 64K 7 7 Mac 0S 8 0 4 gt Show Item Information Problems Starting Up 17 18 Chapter 1 vn 6 o A Notice the name of the currently selected set of exte
139. ove some of the detail from the images m Don t use background printing m Make sure the printer is turned on Some printers need to warm up for a few minutes after you turn them on Problems Using YourComputer 35 The printer may be out of paper or may need attention Check the printer status lights and any messages on your screen Open the desktop printer icon and check for status messages Print a detailed report In the Print dialog box select Print detailed report under Error Handling Reinstall your printer software Check the settings in the application s Page Setup dialog box If there is a setting for printer type make sure it is set to the type of printer you are using Performance and Other Problems Performance decreases If you notice a decrease in your computer s speed and general performance after you install a control panel or system extension the software may not be compatible either with Macintosh computers built with the PowerPC microprocessor or with other system extensions See Resolve system extension conflicts on page 17 You may also need updated software Contact the software manufacturer for more information Use the Memory control panel to turn off virtual memory See the information about memory in Mac OS Help choose Help from the Finder s Help menu Note If you turn on both virtual memory and a RAM disk in the Memory control panel don t set both of them at or near their
140. p time accurately If your clock begins to keep time inaccurately replace the battery See the online documentation that came with your computer for instructions on how to do this xX Important Batteries contain chemicals some of which may be harmful to the environment Please dispose of used batteries according to your local environmental guidelines Lithium Li Icons look strange a There may be a problem with the information that the computer uses to keep track of files To fix this problem rebuild the desktop Hold down the Command 88 and Option keys on the keyboard while you restart the computer You may be using a file compression program to save space on your hard disk Some compression programs change the appearance of icons Font file can t be opened or moved a The font file may be damaged Replace the font in the Fonts folder inside the System Folder Blinking icon appears in menu bar m A program needs attention Open the menu and choose the program whose icon is blinking it may have a diamond by its name Respond to any messages on the screen If it s not clear what you should do consult the documentation that came with the program m Open the Easy Access control panel if it is installed on your computer and check whether any of its features are turned on Computer makes unusual sounds Select a different alert sound in the Monitors amp Sound control panel 38 Chapter 2 a Ifthe sounds ar
141. pport At Apple s support Web site you ll find m Apple software updates Tech Info Library a searchable database of easy to read articles m Tech Exchange a resource for product specific information and support including a discussion forum and the latest news 65 66 Chapter 6 Have This Information Available Before Calling Have the following information and software available when calling the Apple Assistance Center adescription of the problem for example the computer freezes in only one application or at startup what you have tried to do already m the type of computer m the serial number of your computer m the version of system software third party software external devices and so on especially if the problem involves something you have added to the computer a the software install CD Be in front of the computer when you call so you can take steps the technician suggests Using the Apple System Profiler If you are able to start up your computer the Apple System Profiler provides information about your computer that will help you and the Apple Assistance Center troubleshoot your computer To open the Apple System Profiler Choose Apple System Profiler from the Apple menu A System Overview window appears Use the commands in the Select menu to get more specific information about the hardware and software used by your computer or to go back to the System Overview window m To find out what t
142. problem is solved No Go to next step Reseat the 5 connector audio cable on the outside of the A V Interconnect board Looking a the A V Interconnect board from the outside the audio cable is the black connector located on the left If the background noise continues install the microphone gasket 922 3679 that provides an improved seal The gasket is placed on the front bezel around the microphone opening Refer to Take Apart Installing the Microphone Gasket or TIL article 58053 for additional information lol Troubleshooting Symptom Charts IrDA Problems 32 IrDA Problems Two infrared equipped units are unable to communicate via their infrared communication panels to transfer data or commands 9 Clean infrared window with soft lint free cloth Make sure units are spaced greater than three feet but less than six feet and at less than a twenty degree angle Verify infrared signal is being received by host computer Open the IrDA control panel and make sure Auto Connect is selected Refer to the Basics chapter in this manual for an overview of IrDA compatibility with the iMac computer Replace IrDA board Reseat replace the IrDA cable that connects the IrDA board to the A V interconnect board Reseat replace the IrDA cable that runs between the A V interconnect board and the logic board Replace the A V interconnect board 10 Replace the logic board ol Troubleshooting Symptom Charts USB Problem
143. ps with the iMac computer 2 From the ClarisWorks New Document window select Communications and click OK You will be presented with an untitled communications document 3 Click on the settings menu item and select Connection from the menu which will bring up a new window This window allows you to select the communications toolbox device to access the modem 4 Click and hold the menu next to Method and select the Serial Toolfrom the options presented 5 Click on the Internal Modem setting under the Current Portsetting After selecting the port click the OK button You can ignore the rest of the settings 6 Open the serial port by selecting Open Connection from the Session menu 7 Type AT into the Communications document The modemshould respond with an OK message This procedure verifies that the program is connecting with the modem and that the modem is responding A good test to see if the phone line is working is to type ATDT which will open the phone line If the modem reports NO DIALTONE there isn t a valid analog line connected If the phone line works you will hear a dial tone until you press the Return key at which time the modem will report NO CARRIER A No Carrier message means the phone line was successfully opened Other things that can be done here are Call another modem to verify connections Call a working phone number to see if you can successful connect to an outside line
144. r 2 a Ifthe device is connected to a USB hub do the following a Ifthe hub has a power cord make sure the cord is plugged into a working electrical outlet a Try unplugging one or more devices from the hub Message appears saying a device may not provide all of its functions because it requires more power Ifthe device has a power cord make sure the cord is plugged into a working electrical outlet Plug the USB cable from the USB device into a USB port on your computer or another USB device that is plugged into a power outlet Ifthe USB device is connected to a USB hub try unplugging one or more devices from the hub Message appears saying a device plugged into another device needs more power than is available and all ports on the second device have been disabled Ifthe device has a power cord make sure the cord is plugged into a working electrical outlet a Plug the USB cable from the USB device into another USB port on your computer or another USB device that supplies power such as a hub a Ifthe device is connected to a USB hub try unplugging one or more devices from the hub The device isn t working but no message appears m Make sure the USB connectors are plugged in properly a Ifthe device has a power cord make sure the cord is plugged into a working electrical outlet and the device is turned on Some USB devices such as printers need to warm up for a few minutes after you turn them on For m
145. r back on again Quit open applications When you restart your computer the computer tries to quit all open applications Sometimes an application doesn t get the message to quit and you have to quit the application yourself Important Before quitting an application make sure you save any open documents You can quit almost any application by choosing Quit from the File menu or pressing Command 8 Q m If this doesn t work you can sometimes force a program to quit by simultaneously pressing the keys Command 88 Option and Esc Then click Force Quit in the dialog box that appears Note Unsaved changes in your current documents will be lost Immediately save all open documents quit all other open programs and restart your computer If this doesn t solve your problem return to Problems on page 7 Make sure your computer is getting power m Check that the keyboard and mouse cables are properly connected Unplug each cable then reconnect them m Check that the power cord is plugged into a working outlet If it s plugged into a power strip make sure the power strip is turned on If this doesn t solve your problem return to Problems on page 7 Make sure the screen is properly adjusted m Check that the settings for brightness contrast and geometry are adjusted properly in the Monitors amp Sound control panel If this doesn t solve your problem return to Problems on page 7 Problems S
146. r example 10BaseT Ethernet though their data transfer speeds can be comparable The USB host typically provides two or three Type A ports via an internal hub inside the computer case for devices and hubs to connect to New Technologies 21 Figure 3 USB Ports New Technologies 22 Note Type A ports as shown in the previous illustration are only available from hubs If a device like a keyboard or display has Type A ports for additional devices to connect to it must have an internal hub This information is good to know when you need to identify map out and troubleshoot hub and device connectivity Note USB ports cables and plugs are often labeled with the standard USB symbol shown in the following illustration Figure 4 Standard USB Symbol New Technologies 23 e Hubs which serve as connection points for devices Hubs also provide device detection speed matching and power control Hubs connect to the host using the 12 Mbps connection speed Hubs may be bus powered by the USB or be self powered by an external power source like an AC adapter Only hubs can connect to the host Hubs can also connect to other hubs providing expansion to the 127 device limit see the example tree diagram below Hubs can be freestanding or embedded in other items displays keyboards etc Most freestanding external hubs provide 4 Type A ports but this is not a always the case Note When
147. r is using has the Mac OS icon on it which distinguishes it from any other System Folder System Folder Try re blessing another System Folder so that your computer uses that one on startup see Re bless the System Folder on page 16 If that doesn t work try reinstalling system software see Chapter 5 Reinstalling Your Computer s Software on page 53 m Check for viruses on all your disks using a virus detection program Eliminate any viruses the program finds a Use the program s Get Info window to give it more memory Select the program s icon and choose Get Info from the File menu See Message appears saying there s not enough memory on page 23 Ifthe problem occurs when you are trying to print there may not be enough memory for printing Quit other open programs to free memory a If the problem only occurs in one application program check for multiple copies of the program on your hard disk Use the Get Info command to check the programs version numbers Keep one copy of the latest version and throw away all other copies Problems Using Your Computer 25 26 Chapter 2 Also try reinstalling the program from the original disks If reinstalling doesn t solve the problem contact the manufacturer of the program to see if the program contains software errors or bugs and if it is compatible with the version of system software you re using Sometimes incompatible system extensions or con
148. r that your phone line quality is the most important factor here and many people who have poor quality telephone line conditions will almost Modem 33 always connect at 33 6 speeds or less Also line noise will be a major factor on how fast your 56K modem connects For 33 6 Kbps or slower modems line noise is still a factor but it is much less of an issue for achieving good connections CD ROM Drive 34 CD ROM Drive The CD ROM drive is located beneath the screen on the front of the iMac To open the tray press the button in the middle and carefully pull open the tray until it lightly clicks To close the drive push the tray until it is completely closed and locked into place CD Adapter Board The CD adapter board screws onto the back of the CD ROM drive A ribbon cable attaches to the CD ROM adapter board and plugs into connector J14 on the logic board The CD adapter board is part of the CD ROM module and should not be removed or replaced Power Filter Board 35 Power Filter Board The power filter board is an EMC filtering board which is mounted on the logic board mass storage chassis It controls the DC power supply connection from the enclosure and sits between the power supply board and the logic board It is highly unlikely that the power filter board will ever fail but information about this board is included in the No Power section of the Troubleshooting chapter Audio Video Interconne
149. rd between the modem port and the processor module Refer to the Logic Board Diagram in the Basics chapter for location information If you continue to experience system problems refer to Resetting the Logic Board later in this chapter lol Troubleshooting General Resetting the Logic Board 11 Resetting the Logic Board Resetting the logic board can resolve many system problems see the Symptom Cure tables for examples Whenever you have a unit that fails to power up you should follow this procedure before replacing any modules 1 2 a 19001 oe e 8 Unplug the computer Disconnect the cable that runs from the power supply to the power filter board on the bottom side of the logic board mass storage chassis Press the Power On button on the front of the unit Remove the logic board mass storage chassis from the unit Remove the battery from the logic board Wait at least 10 minutes before replacing the battery Make sure the battery is installed in the correct direction Reassemble the computer and test the unit Note This procedure resets the computer s PRAM Be sure to check the computer s time date and other system parameter settings afterwards lol Troubleshooting General Power On Self Test 12 Power On Self Test There is a power on self test that resides in the ROM of the iMac This test automatically runs whenever the iMac is powered on after being fully shut down the power on self
150. rd disks must be reinitialized before you can update the driver See Initializing a Hard Disk on page 49 You see a message that there s not enough memory to use the Installer Make sure you are starting up the computer from the software install CD You see a message that the System file cannot be modified You may have virus protection software installed that guards against modification of the System file Make sure you are starting up the computer from the software install CD Drag any virus protection software out of the System Folder and try installing again You can put the virus protection software back after installation Reinstalling Your Computer s Software 61 62 Chapter 5 a The System and Finder files may be locked To see if your System file or Finder file is locked open the System Folder and select the System or Finder icon Open the File menu and choose Get Info To unlock the file click the Locked checkbox to remove the checkmark Try performing a clean installation of system software See Performing a Clean Installation on page 58 You see a message that the installation was not successful m Make sure the software install CD is the startup disk then try installing system software again If the installation is still not successful try performing a clean installation a Make sure the CD is clean See the online documentation that came with your computer for information on cleaning CDs Respondi
151. rer for assistance Document won t open or application program can t be found The document may have been created with a program that is not on your hard disk or with a different version of the program a Try starting a program that you think might be able to open the document Then choose Open from the program s File menu to open the document For more information see the documentation that came with the program Purchase and install the correct software to use the document or find out if the creator of the document can convert it to a format that one of your programs can use m Rebuild your desktop To rebuild the desktop hold down the Command 8 and Option keys on the keyboard while you restart the computer Hold down the keys until a dialog box appears asking if you want to rebuild the desktop Click OK Don t try to open the files in your System Folder Most of the files in your System Folder are used by your computer for internal purposes and are not intended to be opened a Ifthe document is from a DOS or Windows computer see DOS or Windows document won t open or displays incorrectly on page 28 Document can t be saved a A CD ROM disc is a read only medium This means that information can be read retrieved from it but not written stored on it You can save the changed information on a hard disk QuickDraw 3D could not be found message appears m Make sure that the following files are in the Ext
152. ring the HDA to the carrier Return drives without cables or carriers Exchange hard drive modules in Apple packaging Failure to comply with this requirement may result in a packaging noncompliance charge Refer to the parts database for more information Hard Drive 46 lol Take Apart Chassis Tab e Replacing the Hard Drive Carrier 1 Route the hard drive and CD ROM cables under the metal support bridge on the chassis Slide the hard drive carrier tab one tab on each side into the chassis tab slot Pull the hard drive carrier forward Make sure both tabs slide into the tab slots on the logic board mass storage chassis frame Power Filter Board 47 lol Take Apart Power Filter Board Power Filter Board Before you begin remove the following e Lower access cover e Logic board mass storage chassis Power Filter Board 48 lol Take Apart Screws Power Filter Board Remove the two screws on the power filter board Lift the power filter board off the chassis Note If the logic board is still in place you may feel resistance when prying the power filter board off the logic board connector lol Take Apart Fan 49 Fan Before you begin remove the following Lower access cover e Logic board mass storage chassis Awarning This product contains high voltage and a high vacuum picture tube To prevent serious injury
153. rmation on the disk Before initializing your disk recover all the information you can and copy it to another disk or a network file server Testing and Repairing Your Hard Disk Directory 49 50 Chapter 4 Start up your computer from the software install CD See Chapter 3 Starting Up From a CD on page 45 Locate the Drive Setup icon and double click it to open the Drive Setup program Drive Setup In the list of drives select the disk you want to initialize Drive Setup E List of Drives olume Name s Type Bus IDLUN Macintosh HD ATA 0 0 0 lt CD ROM drive gt ATA 0 0 0 Select a drive and then a function Initialize Click Initialize If initialization fails choose Initialization Options from the Functions menu to select the Low level format and Zero all data options Then try initializing the disk again If initialization fails a second time test your hard disk for damage as described in Testing Your Hard Disk for Physical Damage on page 50 Mac OS Extended Format Mac OS Extended format is a new method of formatting hard disks that allows for more efficient use of hard disk storage space You can format your hard disk with Mac OS Extended format by performing a custom initialization of your hard disk For instructions see Drive Setup Help in the Help menu Testing Your Hard Disk for Physical Damage Note Testing the disk can take two hours or more depen
154. rvice Parts Matrix Outer Front Bezel MMM 922 3563 Bondi Blue MMM 922 3784Grape Top Rear Housing MM 922 3786Lime 922 3561Bondi Blue MME 922 3783 Strawberry 922 3782 ime EE 922 3785Tangerine 922 3781Tangerine i WN 922 3774 Blueberry 922 3780 Grape iz 922 377S8trawberry B Lower Front Panel 922 3773Blueberry JE MME 922 3740 Blueberry MEME 922 3564 Bondi Blue y MM 922 3788 Grape MM 922 3790 Lime MM 922 3787 Strawberry 922 3789Tangerine with IrDA Bottom Rear Housing CD Bezel 922 3578 Bondi Blue Mi 922 3605 Bondi Blue 922 3775 Blueberry MEEI 922 3776Blueberry 922 3796 Grape 922 3798Lime 922 3795Strawberry 922 3797Tangerine Foot Kit with Clips 076 0770 Blueberry 076 0743 Bondi Blue 076 0772Grape Keyboard USB 076 0774Lime 922 3559 Bondi Blue 922 3728 Blueberry 922 3800 Grape 922 3802 Lime 922 3799 Strawberry 922 3801 Tangerine 076 0771 Strawberry 076 0773 Tangerine Lower Access Cover 922 3793Tangerine M 922 3772Blueberry B 922 3573Bondi Blue Hl 922 3792 Grape Es _ 922 3560 Bondi Blue 922 3727 Blueberry ME 922 3804 Grape 922 3806 Lime GB 922 3803 Strawberry E 922 3805 Tangerine 922 3794Lime 922 3791 Strawberry Exploded View 5 iMac Screw Matrix Lower Access Cover 1 CD ROM to CD ROM Carrier 4 w washer microScrew Bottom Housing Brass colored 4 me Imac Screw Matrix Can Assy to CRT Chassi
155. s Listed below are the Ver 2 iMac service parts Exchange or replace the Ver 2 parts like for like they are not backward compatible Identify the part correctly before replacing a module or replacement part Refer to the Service Parts database for additional information 661 2166 Analog Video Board Ver 2 661 2167 Power Supply Board Ver 2 922 3835 Grounding Wire CRT Ver 2 e 922 3836 Audio Cable Ver 2 e 922 3842 Video Cable RGB Ver 2 922 3837 CRT Bottom Frame Ver 2 922 3838 CRT Northern Hemisphere Ver 2 e 922 3839 CRT Southern Hemisphere Ver 2 922 3840 CRT Equatorial Ver 2 922 3841 Fan 92mm Ver 2 lt u gt New CD ROM Drive Released 7 99 12 New CD ROM Drive Released 7 99 Apple recently released a new 24x CD ROM drive service part for five color iMacs with 266MHz processors or faster only Please note that this new 24x CD ROM called the Version 2 is not compatible with the 24x CD ROM drive in the 233MHz Bondi Blue iMacs Although the two iMac CD ROM drives are identical in fit and performance the drives are not interchangeable The 24X CD ROM Version 2 may cause data loss if used in the 233MHz Bondi Blue iMac To ensure proper compatibility please order the correct CD ROM drive when servicing an iMac quip New CD ROM Drive Released 7 99 13 Ordering Parts If you are replacing a 24x CD ROM drive in a Bondi Blue iMac 233MHz order the 661
156. s 33 USB problems refer to symptoms or issues that may occur with external USB devices that are attached to the iMac This could include Apple and or third party USB devices USB Problems 1 Does the unit have the iMac Update 1 0 Ways to tell Run Apple System Profiler In the Device screen the USB version number in the upper left corner should be greater than 1 0 Do a Get Info on the OS ROM file in the system folder Under the name it should be iMac Update 1 0 or greater Note The iMac Update 1 0 improves the customer experience with many USB peripherals Apple recommends every iMac customer install this update The iMac Update 1 0 software is available at no charge through Apple s Software Update Web site http www apple com swupdates Refer to TIL 44005 for additional information 2 Not enough power for the USB device to function The following error message will appear confirming that a device cannot function at all due to a lack of power This lack of power depending on the device can be a result of a disconnected external power source or not enough power available from the hub the device is connected to The two corrective steps listed in the dialog box shown on the next page provide the user guidance in troubleshooting these conditions The device device name cannot operate because it needs more power than is available To correct the problem you can 1 Plug the device into an electrical ou
157. s w lock washer 2 HDA CD ROM Carrier w lock washer 2 Logic Board I O Panel 2 w washer 5 HDA Carrier to HDA w lock washer 4 Underside of Can Interconnect Board Interconnect Board Shield to Can Power Filter w washer 2 same as LB Bottom Housing 4 Speaker 1 ea Fan 2 CRT to CRT Chassis 4 Front outer Bezel 2 Headphone Board 2 Top Rear Housing 2 Power Supply Board 3 Bottom Housing 4 Analog Board 3 Chassis 4 Exploded View Wiring Diagram Analog Video 661 2080 and Power Supply 661 2081 Use this wiring diagram to verify cable connections and to identify visible differences from the Ver 2 analog video and power supply boards The Ver 2 wiring diagram is shown on the next page R Speaker O Power Supply Board 661 2081 Fan 661 0322 P506 Flyback Transformer P702 Analog Board 661 2080 Signal Cable P303 P302 T e q D 99 qe Oh S55 Od Video Board 661 2080
158. s is not a Macintosh disk Do you want to initialize it message 32 USB device messages 33 34 microphone 42 modem settings 19 20 Monitors amp Sound control panel 37 41 42 mouse See also USB devices doesn t work 9 startup problems and 13 troubleshooting USB devices and 14 34 Mouse control panel 37 N O network problems 14 39 41 non USB devices 14 15 Not enough memory message 9 23 24 Index 69 70 Can t find it See also Mac OS Help s onscreen index Open the Help menu and choose Help then click the Index button Index P parameter RAM See PRAM password Administration 40 PC Exchange control panel 28 30 performance problems 36 39 Photo CDs 33 ping server doesn t respond to 41 power insufficient 33 34 power button restarting computer with 12 shutting down computer with 12 sleep and 11 power cord 13 14 33 34 PRAM resetting 19 preferences reinstalling applications and 62 restoring original software and 63 printing problems 35 36 problems See troubleshooting ProDOS partitions 30 programs See application programs Put Away command 31 46 Q question mark icor 8 QuickDraw 3D could not be found message 27 28 42 43 QuickTime Settings control panel 42 quitting application programs 13 29 RAM See memory RAM disk 15 24 re blessing System Folder 16 rebuilding desktop 27 38 recording from audio CDs 42 reinstalling individual applications 62 reinstalling system
159. server or that the server is set up for guest access If trying to connect as a registered user verify that you ve entered your name and password correctly 3 You may need to create pauses while the number is being dialed Insert a comma between parts of the number where a pause might be needed Inserting a comma lengthens the pause For example the following entries cause Remote Access to dial 9 to get an outside line and then pause before dialing the rest of the number 9 555 1234 Modem Dropping Connection 1 The phone line may be too noisy to handle the higher modem speeds Try connecting at a slower speed or use a generic CCL file If you are familiar with the CCL script language you can edit the modem script to force a connection at a lower lol Troubleshooting Symptom Charts Modem Dropping Connection 41 User Disconnected After Period of Time You are Left Waiting for a Callback speed If the problem continues contact the phone company to report the bad phone line With call waiting active an incoming call can interrupt the connection Disable call waiting using AT commands placed in the init string of the dialup application Usually the string is 70 Servers sometimes develop problems that disconnect users without explanation Try calling back later or use an alternate number if one is available Reseat the modem If the problem persists replace the modem Some services or software packages have a feat
160. side of the board Replacement Note Ensure that the audio video interconnect board ports and tabs are positioned correctly into the chassis holes Take Apart Audio Video Interconnect Board 55 3 Disconnect the cables on the audio video interconnect board 4 4 Pull the board up and out of the chassis Note Remove all cables before returning the board to Apple Audio M ideo Interconnect Chassis Bridge lol Take Apart Bottom Rear Housing 56 Bot tor Housing ae Bottom Rear Housing Before you begin remove the following e Lower access cover e Logic board mass storage chassis Front lower panel Note The bottom rear housing includes the flip foot The computer should never be picked up by the flip foot If needed the flip foot is also available separately Refer to the parts database lol Take Apart Bottom Rear Housing 57 1 Remove the eight screws Note Four screws are fine threaded screws that screw into metal the four other screws are coarse threaded screws that screw into plastic One screw is located inside the I O panel door Fine Thread Coarse Thread Screw Behind Boor L Fine Thread x J Screws a a lol Take Apart Bottom Rear Housing 58 2 Press down on the tab and pull the bottom housing off the computer Bottom Housing lol Take Apart Front Lower Panel 59 Front Lower Panel Before
161. system software p 21 Keyboard or mouse doesn t work Try these solutions m Make sure external devices are properly connected and turned on p 14 m Resolve system extension conflicts p 17 a Test and repair the hard disk directory p 21 Reinstall system software p 21 Message appears Message about system software appears Try these solutions a Take notes p 11 a Make sure you re using the correct disk as a startup disk p 16 Reinstall system software p 21 Not enough memory message appears Note These solutions are for system software memory problems For problems with application memory see Problems With Applications Documents and Memory on page 23 Try these solutions m Increase the memory available for system software p 15 m Check RAM disk settings in the Memory control panel p 15 m Resolve system extension conflicts p 17 Problems Starting Up 9 10 Chapter 1 Disk corruption message appears on startup Try these solutions a Take notes p 11 m Check RAM disk settings in the Memory control panel p 15 Normal desktop doesn t appear Screen is dark Try these solutions a Wake up your computer p 11 m Make sure your computer is getting power p 13 Reset the PRAM p 19 No icons appear in windows and pointer alternates between an arrow and a wristwatch Try this solution Reset the window display p 16 Empty f
162. t came with the unit to get the correct version of Mac OS No The hard drive or its software drivers are most likely the problem Can you see the hard drive using Drive Setup Yes Use Drive Setup 1 5 1 to reinstall the software drivers for the hard drive If the problem persists use Drive Setup 1 5 1 to reinitialize the hard drive See TIL article 22206 for Drive Setup information Warning You will lose all data on the hard drive when you reinitialize it Backup the data first if possible No Go to next step 2 Ifyou don t see the hard drive using Drive Setup 1 5 1 Check all cable connections to and from the hard drive Replace the hard drive CD data cable Replace the hard drive Replace the hard drive power cable 3 Replace the logic board lol Troubleshooting Symptom Charts Can t Wake From Sleep 24 Can t Wake From Sleep Computer cannot be brought out of sleep mode by pressing a key on the keyboard The problem is usually evident by a black screen and a Green or Amber LED 1 Is the front LED green Yes Replace the Analog Video Board exchange like for like there are two versions of this board No Go to next step Reinstall System Software You must use the system software that came with the unit in order to get the correct version of Mac OS Reset the PRAM by holding down the Option Command P and R keys lol Troubleshooting Symptom Charts System Hangs Freezes During Boot
163. t Installing a Microphone Gasket 128 2 Replace the front outer Tabs bezel taking care not to dislodge the gasket Tab Holes Tabs on Other Side Tool lol Take Apart Installing a Microphone Gasket 129 Wii 3 Replace the two front Wilt bezel screws Screws Outer Bezel Service Source Upgrades iMac Lower Access Cower SDRAM Before you begin position the iMac face down on an ESD mat 1 Remove the lower access cover lol Upgrades 2 2 Remove the two screws at the top of the logic board mass storage chassis and disconnect the cables and screw clamp Logie Board Mass Storage 7 Chassis 3 Logie Board Mass Storage Chassis Using the handle pull the main logic board mass storage chassis from the unit 4 4 Place the logic board mass storage unit on an ESD mat lol Upgrades Processor Card Top Shield 5 Remove the processor card top shield 6 AN aT RAM Expansion Slot by Metal Tab NI Bie iy A Tab ANS i QS HLA a S Metal Tab S S Line up the notch in the SDRAM DIMM with the small plastic tab in the SDRAM slot Push in on the card and then down until the two metal snaps click into place L Note There are two expansion slots for RAM DIMM modules on the microprocessor board One slot is on the top side of the processor
164. t open applications on page 13 Force your computer to restart Ifyou are unable to restart your computer as described above try pressing the Command 88 and Control keys simultaneously while also pressing the power button on your Apple USB keyboard or on the front of the computer Open the cover on the side of your computer and locate the Reset hole it s the upper hole on the right side between the Ethernet and modem ports Carefully insert the end of a large straightened paper clip into the hole and push gently Do not use excessive force Your computer should restart m If neither of the above suggestions work unplug your computer Wait at least 30 seconds then reconnect the power plug and turn your computer on by pressing the power button on your Apple USB keyboard or on the front of the computer If this doesn t solve your problem return to Problems on page 7 Shut down the computer Always try shutting down your computer the proper way Open the Special menu and choose Shut Down or press the power button O on your Apple USB keyboard or on the front of the computer In the dialog box that appears click Shut Down If the computer freezes Try quitting open applications See the following section Quit Open Applications Force your computer to shut down If you are unable to shut down your computer the normal way unplug your computer Wait at least 30 seconds before turning your compute
165. tarting Up 13 14 Chapter 1 Make sure external devices are properly connected and turned on Make sure connectors are plugged in all the way Try unplugging connectors on all of the devices then plugging them back in If the device has a power cord make sure the cord is plugged into a working electrical outlet Make sure the device is turned on If you are connected to an Ethernet network Check the settings in the AppleTalk control panel to make sure that Ethernet is selected Your computer may not start up because of heavy network traffic Disconnect the Ethernet cable then start up again Reconnect the Ethernet cable after the computer starts up It s okay to connect and disconnect an Ethernet cable while your computer is on For USB devices Plug the device into another USB port on your computer or into the USB port on another device that is plugged into a power outlet such as a self powered hub If the device is connected to a hub try unplugging one or more devices from the hub If the device is connected to a self powered hub a hub that has a power cord make sure the cord is plugged into a working electrical outlet Unplug all USB devices from your computer except the Apple USB keyboard and Apple USB mouse Plug one device in at a time to determine which device is the problem then refer to the documentation that came with the device Also see the information on connecting equipment in the online docume
166. tection Plan repairs For pricing information refer to Service Price Pages Warranty 63 Canada Only The iMac computers are covered under the Apple One Year Limited Warranty The AppleCare Protection Plan is also available for these products Service Providers are reimbursed for warranty and AppleCare Protection Plan repairs For pricing information refer to Service Price Pages Service Source Specifications iMac ia Specifications Introduction 1 Introduction Specifications information for this product can be found in the Spec Database which you can access at Service Source Online http service info apple com or on Service Source CD Spec Database at Service Source Online From the Service Source Online home page click Troubleshoot and Repair to access the main repair procedures page Then click either Apple Spec in the navigation table in the upper right corner of the page or click Apple Spec Database from the list of reference tools below Spec Database on Service Source CD Open the CD and double click the Apple Spec Database alias located at the top level of the CD Service Source Troubleshooting iMac o Troubleshooting General 1 General ol Troubleshooting General Block Diagram 2 Block Diagram The following illustration provides an overview of the iMac internal components and shows how they are connected RGB Cable P301 Video Board CRT Power Cable P701 P702
167. ter startup eject the CD by selecting its icon and choosing Put Away from the File menu or by dragging its icon to the Trash CHAP Testing and Repairing Your Hard Disk Directory If you see a message reporting that a disk is damaged or unreadable the directory on your hard disk may have become corrupted The directory can be corrupted any time the computer is not shut down properly using the Shut Down command when your computer freezes or crashes Repairing Corrupted Data on Your Disk Most data corruption can be fixed easily by using Disk First Aid Disk First Aid is an application on the software install CD that came with your computer 1 Start up your computer from the software install CD See Chapter 3 Starting Up From a CD on page 45 2 Locate the Disk First Aid icon and double click it to open the Disk First Aid program 1 p Disk First Aid 3 Click the icon of the disk you want to test 47 Disk icons appear in a box at the top of the Disk First Aid window Disk First Aid Select volumes to verify Number of volumes selected 1 ATA 0 3 08 Startup Disk Review instructions and results Disk First Aid Verify Disk First Aid is a utility which verifies the directory structure of any Hierarchical File System HFS or HFS Plus based storage volume Many hard 7 disk drives floppy disk and Compact Disk CD drives are examples of Repair H
168. test does not run if the machine is only restarted If a problem is detected during the test you will not hear a normal startup chime Instead the system will beep as explained below Refer to Error Beeps later in this chapter for instructions on how to troubleshoot and repair an iMac that sounds error beeps at startup time Following is a definition of what the error beeps at startup time signify 1Beep No RAM is installed or detected 2 Beeps EDO memory is installed The iMac ships with SDRAM SO DIMMs and does not accept EDO memory 3 Beeps No RAM banks passed memory testing 4or5 Beeps Bad checksum for the remainder of the boot ROM The ROM which is located on the processor module is bad lol Troubleshooting General Video Flow 13 Video Flow Video signals begin on the logic board at connector J16 and travel to connector J2 on the A V interconnect board The video signals then travel out from connector J5 on the opposite side of the A V interconnect board and continue on via the internal RGB cable to P301 on the analog video board From there the signals are transmitted to the CRT where they are displayed on the screen Click here to see an animation of how the video signal travels through the iMac Sound In Flow Sound coming into the iMac system originates at the internal microphone located in the top front area of the system or through an external microphone connected to the logic board
169. th by pushing the board up and out of the chassis frame Headphone ower Board Screws o Take Apart Front Outer Bezel 71 Outer Bezel Front Outer Bezel f Hilti a Alida Before you begin remove niin LENEE EEE EEN _ the front lower panel which is attached to the bottom housing E te Apart Front Outer Bezel Remove two screws on the front outer bezel Screws Outer Bezel Front Outer Bezel 73 lol Take Apart Tab Holes Tabs on Other Side Too With the CRT facing you use a plastic tool to push in the tabs on the left side and then on the right side to release the tabs from the bezel holes Start pushing the tabs in from the bottom left corner and work your way to the top Note Be careful not to damage the plastics Grab the bezel from the bottom and pull the bezel forward and up to remove it or Take Apart Front Inner Bezel Front Inner Bezel 74 Front Inner Bezel Before you begin discharge the CRT and remove the following e Lower access cover e Main logic mass storage chassis Bottom rear housing e Front lower panel e Front outer bezel Top rear housing e CRT EMI shield Analog video board e Power supply all Take Apart Microphone Connector Screws Front Inner Bezel 75 warning This product contains high voltage and a high vacuum picture tube To prevent serious
170. the I O panel hook into the chassis These tabs allow the I O panel to tilt Logic Board 15 lol Take Apart Logic Board Holding the logic board by its edges gently lift the logic board to disconnect it from the power filter board located underneath Replacement Note Before returning the logic board to Apple remove the heatsink CPU shields processor card modem card plastic modem standoff and read the information on the next page about the Ethernet hardware ID label Take Apart Logic Board 16 Ethernet Hardware ID Label The replacement logic board ships with an Ethernet hardware ID label You must affix the new label over the existing Ethernet label which is located above the serial number Do NOT cover up the serial number information that is printed on the existing Ethernet label Logic Board 17 uA tT TA j TUBA dih OL Reconnecting Logic Board Cables When reconnecting cables to the logic board make sure the CD ROM data cable runs underneath the metal bridge The remaining cables rest on top of the metal bridge lol Take Apart Processor Card 18 Processor Card and Shield Processor Card Before you begin remove the following Lower access cover e Logic board mass storage chassis lol Take Apart Processor Card 19 Processor Card Top Shield 1 Remove the top shield from the processor card lol Take Apart Processor Car
171. the disc is lying flat in the tray Gently push the tray in Hold down the C key on your keyboard while you choose Restart from the Special menu and wait for the message Welcome to Mac OS to appear If this doesn t work restart the computer make sure the CD is inserted and hold down the Command Option Shift and Delete keys to temporarily disable the hard disk Hold the keys down until the message Welcome to Mac OS appears When you see the screen that says Mac OS and the phrase Starting Up release the C key In a few seconds the desktop appears The CD s icon appears at the top right corner of the desktop above your hard disk icon and the Apple menu does not contain the usual items Note The desktop pattern is different from the pattern you normally see since your computer is now using the system software that s on the CD Your regular desktop pattern will reappear when you start up from your normal startup disk 45 46 Chapter 3 When You re Done With the CD When you start up your computer from a CD the CD cannot be ejected in the usual way To restart your computer from the hard disk and eject the CD Choose Restart from the Special menu Immediately after hearing the startup sound press the eject button on the front of the CD ROM drive Note You can also change the startup disk by opening the Startup Disk control panel and selecting the hard disk Restart your computer Af
172. tlet if it has a power cord 2 Unplug the device and plug it into another USB porton your computer or other device that ia plugged into a power outlet 3 USB device experiencing a partial lack of power Similar to the first error message this error message indicates a device may not completely function due to a partial lack of power and ol Troubleshooting Symptom Charts USB Problems 34 gives steps to remedy the problem USB driver missing This The device device name may not provide all functions because it requires more power To correct the problem you can 1 Plug the device into an electrical outlet if it has a power cord 2 Unplug the device and plug it inte another USB port on your computer or other device that iz plugged into a power outlet error message indicates the device s driver is missing Customers will need to check the instructions that came with the device and install the Mac OS driver The software needed for device name cannot be found Some or all of its features may not work Please refer to the device documentation to install the necessary software C 4 Bad USB connector Connect the problem device directly into one of the iMac USB ports or if it s already connected to one of the iMac USB ports switch it to the other port 5 Bad USB device Replace the USB device 6 Replace the logic board lol Troubleshooting Symptom Charts Cursor Problems 3
173. to leave the program or click Continue to install or remove other software Reinstalling Your Computer s Software 57 58 To perform a clean installation click Options Chapter 5 Performing a Clean Installation This section provides instructions for what is commonly called a clean installation of system software Performing a clean installation is more complicated than a standard installation but it is sometimes the best way to solve a persistent problem A clean installation gives you a fresh start with system software When you install system software using a clean installation the Installer creates a new System Folder on your hard disk The old System Folder is renamed Previous System Folder Since your computer has a new System Folder after a clean installation you must reinstall custom fonts extensions and control panels that you ve added to your system or that came with utility or application programs You will also need to reset modem settings in communications software programs you are using Note Though application programs are not replaced or changed some require system software components that are removed from the System Folder during a clean installation You may need to reinstall these applications after you perform a clean installation Start up your computer from the software install CD ROM disc See Chapter 3 Starting Up From a CD on page 45 Open the Mac OS Install application In the Welcom
174. trol panels can cause system software problems Restart while holding down the Shift key this temporarily turns off all system extensions If your computer works normally after you do this use the Extensions Manager control panel in the Control Panels folder in the Apple menu to turn on extensions and control panels one at a time Restart after you turn on each extension or control panel This procedure should identify incompatible extensions and control panels If you just added new software to your computer its system extension is the most probable cause of the problem See Resolve system extension conflicts on page 17 If your computer performs better when a particular extension or control panel is turned off contact the software s manufacturer for information or an upgrade Reduce the number of active fonts in your system by moving fonts from the Fonts folder to another folder such as Fonts Disabled Then restart your computer If the problem recurs you may need to reinstall system software See Chapter 5 Reinstalling Your Computer s Software on page 53 Application won t open The application program may already be open Check the Application menu to see which programs are running There may not be enough memory available to open the program Quit any programs you re not using and try again If that doesn t work try restarting the computer You can also use virtual memory to make more mem
175. troubleshooting power errors that bus powered hubs can t be connected to bus powered hubs since not enough power is provided to power the device ports Instead to extend the USB properly users should alternate self powered and bus powered hubs New Technologies 24 Devices which connect to hubs and provide expanded functionality to the computer Devices connect to the host using either the 1 5 or the 12 Mbps connection speed Like hubs devices may be bus powered by the USB network or be self powered by an external power source Devices can only connect to hubs Devices cannot connect directly to devices but looks can be deceiving since some devices are combined with hubs in the same physical case New Technologies 25 The following tree diagram shows an example of a USB network New Technologies 26 Can both Reside inside CPU Case Root Tier Figure 5 USB Network Tiers New Technologies 27 USB Connectivity Rules Following are the rules for USB connectivity The maximum number of devices that can be connected to a single USB hub is 127 devices Note A keyboard with a built in trackball counts as two devices The maximum number of tiers allowed is six This can be tricky to track sometimes since hubs can be hidden in CPU cases displays keyboards etc Bus powered hubs can t be connected to bus powered hubs due to power limitations A keyboard with an internal
176. tware If you are having problems with your computer you may not be able to open any files with preferences or customized settings Restoring All Original Software The Apple Software Restore application located on the software restore CD restores all your original software including original system software factory settings and applications that came with your computer This application gives you the option of erasing your hard disk before restoring the original software or just replacing the original software Restore In Place Before Restoring Your Software Before you begin the restore process do the following a Customized preferences and settings If you have preferences or settings in control panels and individual applications make a note of them so you can easily reset them if necessary after you install system software Note If you are having problems with your computer you may not be able to open any files with preferences or customized settings a Software that runs in the background Ifyou are using software that runs in the background such as virus protection software or access control software you may need to turn it off before you reinstall system software For instructions see the documentation that came with the software Important t is highly recommended that you back up the data on your hard disk on an external storage device or network file server before restoring your system Restoring In Place
177. up 1 5 1 to reinstall the software drivers for the hard drive If the problem persists use Drive Setup 1 5 1 to reinitialize the hard drive See TIL article 22206 for Drive Setup information Warning You will lose all data on the hard drive when you reinitialize it Backup the data first if possible 5 No Go to next step If you don t see the hard drive using Drive Setup Check all cable connections to and from the hard drive Replace the hard drive CD data cable Replace the hard drive Replace the hard drive power cable Disconnect all external devices USB and Ethernet Then begin reconnecting these devices one at a time beginning with the keyboard and then the mouse and start up the computer after each device is connected to see if one of the external devices is causing the problem If the problem occurs after you connect a particular external device replace the device in question lol Troubleshooting Symptom Charts Networking Problem 26 Unable to switch to the Ethernet network option in the control panel or unable to see any network devices 7 Replace the logic board Networking Problem 1 Wrong option selected in the Control Panel Open the Network control panel and select the Ethernet option Are you able to select the Ethernet option Yes Verify that you can now see devices on the network If the problem persists go to the next step No Go to next step Reset parameter RAM Hold down
178. ur screen may look slightly different from the one pictured here 2 Ifyou want to update the hard disk drivers and create an installation report click Options In the window that appears click the appropriate checkboxes then click OK 3 Click Start 4 When the installation has finished restart your computer Custom Installation 1 In the window that appears select the software to install the software to remove or both iMac Install Data amp Custom Installation and Removal Click Start to launch selected software installers Software components Installation mode O Mac 0S 8 1 Rec d Installation O Mac 0S Info Center Recommended Installation Oo Internet Access Recommended Installation Select the software you O Mac OS Runtime for Java Ree d Installation want to add or remove Apple Remote Access O Personal Web Sharing O QuickDraw 3D Don t Customize start 56 Chapter5 you want to install or remove a Select the components gt D Assistance 3 975K G x Open the pop up menu next to each software product and choose an option m Customized Installation lets you choose the components to install Customized Removal lets you choose the components to remove Note Recommended Installation installs the standard components All available components for the software product appear in a window 70 select all components or no
179. ure that will disconnect the user after a set period of time Either increase this time setting or disable the feature if possible Contact the ISP or network administrator for more information 1 Contact the network administrator to verify the callback number you are using is correct and then try again If there is an attempt to callback but the connection fails verify you are using the correct modem script and then try again ia Troubleshooting Symptom Charts Modem Performance Issues 42 Modem Performance Issues Slow Response 1 When using an ISP users need to remember that the ISP only has a limited amount of bandwidth to the Internet If a large amount of people are dialing in individual s speeds will be affected 2 Refer to Modem Performance Issues in the Basics chapter for an overview of factors that can affect modem performance Service Source Take Apart iMac lol Take Apart General Tools 2 Tools The following tools are recommended for procedures in this chapter Spring hook removal tool 922 1547 to remove the processor card Plastic screwdriver 922 3504 to release tabs on plastic housing Jeweler s Phillips screwdriver size 00 mm to remove CD ROM bezel CRT discharge tool Nut driver or pliers to remove thumbscrews on the audio video interconnect board Needlenose pliers Phillips screwdriver ESD mat Tools 3 ia Take Apart Procedures lol Take Apart Lower
180. us using the Display Adjustment Utility on the MacTest Pro CD See Focus in the iMac Adjustments chapter for instructions Adjust the screen geometry using the Display Adjustment Utility on the MacTest Pro CD See Geometry in the iMac Adjustments chapter for instructions Adjust the cutoff or white balance using the Display Adjustment and Display Service Utilities on the MacTest Pro CD See Video in the iMac Adjustments chapter Adjust the cutoff and white balance using the Display Adjustment Utility on the MacTest Pro CD See Video in the iMac Adjustments chapter for instructions Replace the analog video board Refer to the Service Parts Database for the correct part number there are two versions of the analog video board lol Troubleshooting Symptom Charts Video Problems 21 A predominant color tint or color covering the screen Erroneous text or characters appear on the screen 1 Verify that the iMac unit is not near other equipment such as speakers radios phones fluorescent lighting magnets or other electronic equipment that could affect the video display If necessary move the iMac computer to another area and restart the unit Reseat the video cable connecting from the interconnect board to the main logic board Make sure that both ends of the cable are firmly seated into their connectors The interconnect board to logic board video cable routes behind the CD ROM drive If the
181. using Follow these steps to reset the PRAM Important Make sure you are using an Apple USB keyboard This procedure may not work with some USB keyboards from manufacturers other than Apple Make sure the Caps Lock key is not engaged Restart your computer and immediately press and hold the Command 8 Option P and R keys Hold the keys down until you hear the startup sound a second time then release the keys If you had special settings in any control panels or applications open those control panels or applications to restore the settings you want If you set preferences for amodem open the communications software program you are using and restore any modem settings If this doesn t solve your problem return to Problems on page 7 Problems Starting Up 19 20 Chapter 1 X Lithium Li Make sure memory is installed correctly If you hear one or more beeps there may be a problem with the memory in your computer If you recently installed RAM in your computer check the installation instructions in the online documentation that came with your computer to make sure it is properly installed Make sure you ve used the proper type of RAM for your computer If this doesn t solve your problem return to Problems on page 7 Replace the computer s backup battery If you have intermittent problems starting up your computer and the date is reset replace the battery See the online documentation that
182. ware 21 Where to Find Onscreen Help 22 Mac OS Help 22 Mac OS Info Center 22 Problems Using Your Computer 23 Problems With Applications Documents and Memory 23 Problems With Hard Disks CDs and Other Storage Media 29 Problems With Hard Disks 29 Problems With CD Drives and Discs 30 Problems Using ISO 9660 or High Sierra Discs 32 Problems Using Photo CDs 33 Problems Playing Audio CDs 33 Problems With USB Devices 33 Problems Printing 35 Performance and Other Problems 36 Problems With Networks and File Sharing 39 Problems With Sound and Video 41 Starting Up From a CD 45 Starting Up From the Software Install CD 45 Testing and Repairing Your Hard Disk Directory 47 Repairing Corrupted Data on Your Disk 47 If Disk First Aid Cannot Correct the Problem 48 Updating the Hard Disk Drivers 49 Initializing a Hard Disk 49 Mac OS Extended Format 50 Testing Your Hard Disk for Physical Damage 50 Reinstalling Your Computer s Software 53 Reinstalling System Software 53 Before Installing System Software 53 Reinstalling Mac OS System Software 54 Selecting Which Software to Install 55 Performing a Clean Installation 58 Reinstalling Your Custom Extensions Fonts and Control Panels 59 If the Clean Installation Didn t Solve the Problem 60 Problems During Installation 60 Responding to Messages About Your Hard Disk 62 Reinstalling Individual Applications 62 Restoring All Original Software 63 Before Restoring Your Software 63 Restoring In Place
183. wer Supply Board Ver 2 108 Screws 1 Remove the three silver screws on the power supply board Note There are two versions of the power supply board 661 2081 and 661 2167 Ver 2 They must be exchanged like for like Refer to the Service Parts database or the wiring diagram for the Rev 2 Analog Video and Rev 2 power supply boards located in the Exploded View chapter Power Supply Board Ver 2 109 lol Take Apart Power Supply Rew 27 T n 2 Disconnect P904 P906 and P902 Connector CN1 is hard wired to power supply and P907 stay connected to the power supply Note There is a ground clip connected near the AC plug not shown here If replacing the power supply remove the ground clip from the defective board and place it on the replacement module The ground clip does not ship with the new service part Power Supply Board Ver 2 110 Note There is also a fuse on the AC line on the power supply board The fuse is located at F901 near the bottom right corner of the installed power supply board as you are facing the back side of the board Before replacing the power supply board test the fuse Refer to the Testing for Power in the iMac Troubleshooting chapter for instructions on how to check the power supply board fuse This fa Take Apart Power Supply Board Ver 2 111 fuse is an orderable service part and can be replaced by servi
184. you have at least 400K of space available on your hard disk Some disk formatting programs don t work with file sharing If you use such a program contact the manufacturer or vendor for compatibility information There may be a problem with some of the information your computer uses to start up file sharing Follow these steps in order until the problem is solved 1 Open the File Sharing control panel and enter new information in the Network Identity section Then try again to turn on file sharing 2 Remove the File Sharing folder from the Preferences folder inside the System Folder Then restart the computer and try to turn on file sharing 3 Reset the PRAM See Reset the PRAM on page 19 4 Remove the Users amp Groups Data File from the Preferences folder inside the System Folder Restart the computer 5 Reinstall system software See Chapter 5 Reinstalling Your Computer s Software on page 53 Item can t be shared Make sure you have at least 1 MB of space available on your hard disk Some removable storage devices can t be shared Check with the manufacturer or vendor of the device for more information Some disk formatting programs don t work with file sharing If you use such a program check with the program s manufacturer or vendor Can t open a shared disk or folder You may not have the access privileges needed to use the disk or folder Ask the network administrator or the owner of the share

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