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Dell 650 Personal Computer User Manual

1. 14 Partition and logically format your drive before you proceed to the next step See the documentation for your operating system for instructions 15 Test the hard drive by running the Dell Diagnostics 16 If the drive you just installed is the primary drive install your operating system on the hard drive Floppy Drive A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Removing a Floppy Drive 1 Disconnect the power and floppy drive cables from the back of the floppy drive floppy drive connector DSKT 2 Press inward on the two tabs on the sides of the drive slide the drive upward and remove it from the floppy drive bay tabs 2 floppy drive Installing a Floppy Drive 1 If you are replacing a drive and the the new drive does not have the bracket rails attached remove the rails from the old drive by removing the two screws that secure each rail to the drive Attach the bracket to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws two screws on each rail bracket rails 2 2 Gently slide the drive into place until the tabs securely click into position 3 Attach the power and floppy drive cables to the floppy drive 1 power cable 2 floppy drive cable 4 If you are installing a new floppy drive rather than r
2. 450 computer see System Board Components or for the Dell Precision 650 computer see System Board Components or the system board label inside your computer For dual processor operations both processor sockets and the VRM connector must be populated To locate the VRM connector see the system board components illustration for the Dell Precision 450 computer see System Board Components or for the Dell Precision 650 computer see System Board Components or the system board label inside your computer For dual processor operations the two processors and the VRMs must be identical If the processors do not match you receive a system message If the processors voltage don t match or the VRM is not properly installed the diagnostic lights indicate an error If you are upgrading your microprocessor keep your original microprocessor heat sink and securing clips for future troubleshooting Installing the Microprocessor A CAUTION The processor can get very hot during normal operation Ensure that the processor has had sufficient time to cool before you touch it 1 Remove the microprocessor airflow shroud for the Dell Precision 650 computer see Microprocessor Airflow Shroud Dell Precision 650 Computer or for the Dell Precision 450 computer see Microprocessor Airflow Shroud Dell Precision 450 Computer If you are replacing a microprocessor see Removing the Microprocessor NOTICE You must position the micro
3. Board Controller Controller Card Device ome tape or DAT drive SSCS NOTE There is no requirement that SCSI ID numbers be assigned sequentially or that devices be attached to the cable in order by ID number If two or more devices use the same ID your computer may hang during POST and in SCSI BIOS SCSI devices installed by Dell are configured correctly during the manufacturing process You do not need to set the SCSI ID for these SCSI devices If you attach additional optional SCSI devices see the documentation for each device for information about setting the appropriate SCSI ID number NOTICE Dell recommends that you use only SCSI cables purchased from Dell Cables purchased elsewhere are not guaranteed to work with Dell computers Device Termination SCSI logic requires that termination be enabled for the two devices at opposite ends of the SCSI chain and disabled for all devices in between It is recommended that you use terminated cables and that you disable termination on all devices See the documentation provided with any optional SCSI device you purchase for information on disabling termination on the device General Guidelines Follow these general guidelines when installing SCSI devices in your computer Although you install SCSI devices essentially the same way as other devices their configuration requirements are different For details on configuring your particular SCSI subsystem see the documentation fo
4. and Guide Dell Precision 650 Computer Removing the Power Supply Removing the Card Fan and Guide Replacing the Power Supply Replacing the Card Fan and Guide System Board The Card Fan Guide Removing the System Board Memory Replacing the System Board Memory Installation Guidelines Closing the Computer Cover Removing a Memory Module Adding a Memory Module Microprocessor Airflow Shroud Dell Precision 650 Computer Removing the Microprocessor Airflow Shroud Installing the Microprocessor Airflow Shroud Microprocessor Airflow Shroud Dell Precision 450 Computer Removing the Microprocessor Airflow Shroud Installing the Microprocessor Airflow Shroud Information in this document is subject to change without notice 2002 Dell Computer Corporation All rights reserved Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden Trademarks used in this text Dell the DELL logo and Dell Precision are trademarks of Dell Computer Corporation Microsoft and Windows are registered trademarks of Microsoft Corporation Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its own Models WML and WMF October 2002 Rev A00 Back to Contents Page Battery Dell Precision Workstation 6
5. and fold cables out of the way to provide airflow for the fan and cooling vents 9 Close the computer cover NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 10 Connect your computer and devices to electrical outlets and turn them on See the documentation that came with the drive for instructions on installing any software required for drive operation 11 Update your configuration information by setting the appropriate Drive option O or 1 under Drives Secondary to Auto See Advanced Features in your User s Guide for more information 12 To verify that your computer works correctly run the Dell Diagnostics Back to Contents Page Back to Contents Page Power Supply Dell Precision 450 Computer Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Removing the Power Supply Replacing the Power Supply A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Removing the Power Supply NOTICE Before disconnecting a device from the computer wait 10 to 20 seconds after disconnecting the computer from its electrical outlet Before removing a component from the system board verify that the standby power light on the system board has turned off To locate this light see System Board Components 1 Disconnect the power supply cables from t
6. left inside the computer 3 Close the computer cover a Pivot the cover down and into position b If your computer has a baffle ensure that the baffle is correctly positioned by guiding it into place as you lower the cover c Press down on the cover to close it d Once the cover is closed slide the release latch to the right until the latch clicks into place Dell Precision 650 Computer 1 cover release latch security cable slot padlock ring Dell Precision 450 Computer cover release latch padlock ring 4 f you are using a padlock to secure your computer install the padlock NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 5 Connect your computer and devices to electrical outlets and turn them on Back to Contents Page Back to Contents Page Opening the Computer Cover Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide A CAUTION To guard against electrical shock always unplug your computer from the electrical outlet before opening the cover 1 Lay the computer on its side as shown in the illustration o NOTI CE Ensure that sufficient space exists to accommodate the open cover at least 30 cm 1 ft of desk top space 2 Open the computer cover a Slide
7. 50 and Dell Precision Workstation 450 Service Manual A CAUTION Before you begin this procedure follow the safety instructions in the System Information Guide A coin cell battery maintains computer configuration date and time information The battery can last several years The battery may need replacing if you have repeatedly reset the time and date information after turning on the computer or if one of the following messages appears Time of day not set please run SETUP program or Invalid configuration information please run SETUP program or Strike the Fl key to continue F2 to run the setup utility To determine whether you need to replace the battery reenter the time and date in system setup and exit the program to save the information Turn off your computer and disconnect it from the electrical outlet for a few hours then reconnect the computer turn it on and enter system setup If the date and time are not correct in system setup replace the battery You can operate your computer without a battery however without a battery the configuration information is erased if the computer is turned off or unplugged from the electrical outlet In this case you must enter system setup and reset the configuration options CAUTI ON A new battery can explode if it is incorrectly installed Replace the battery only with the same or equivalent type recommended by the manufacturer Discard used batteries according to the manu
8. BIOS identifies the components that require address space The BIOS dynamically calculates the amount of reserved address space required It then subtracts the reserved address space from 4 GB to determine the amount of usable space If the total installed computer memory is less than the usable space all installed computer memory is available for use only by the operating system If the total installed computer memory is equal to or greater than the usable address space a small portion of installed memory is available for use by the operating system Removing a Memory Module 1 Press down and outward on the securing clips 2 Grasp the module and pull up If the module is difficult to remove gently ease the module back and forth to remove it from the connector notch memory module securing clips 2 alignment keys Adding a Memory Module 1 Press out the securing clip at each end of the memory module connector 2 Align the notch on the bottom of the module with the crossbar in the connector 3 Insert the module into the connector ensuring that it fits into the guides at each end of the connector Carefully press each end of the module into place The memory module socket has alignment keys that allow the memory module to be installed in the socket only one way memory module securing clips 2 alignment keys 4 Pull up on the securing clips to lock the modules into place If you insert the module cor
9. CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Overview Your computer supports Three hard drives One floppy drive Three CD or DVD drives floppy drive s CD DVD drive s hard drive s I DE Drive Addressing When you connect two IDE devices to a single IDE interface cable and configure them for the cable select setting the device attached to the last connector on the interface cable is the primary master or boot device drive 0 and the device attached to the middle connector on the interface cable is the secondary slave device drive 1 See the drive documentation in your upgrade kit for information on configuring devices for the cable select setting Since cable select is the default setting any additional drives that are installed do not need to be set as a primary or secondary drive Your computer supports up to two IDE devices Hard drives should be connected to the connector labeled IDE1 and CD DVD drives should be connected to the connector labeled IDE2 Connecting Drive Cables When you install a drive you connect two cables a DC power cable and an interface cable to the back of the drive interface connector 1 colored stripe on cable interface cable Most interface connectors are keyed for correct insertion that is a notch or a missing pin on one connector matches a tab or a filled in hole on
10. Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Before You Begin Microprocessor Recommended Tools Installation Guidelines Precautionary Measures Installing the Microprocessor Protecting Against Electrostatic Discharge Removing the Microprocessor Opening the Computer Cover VRM Inside Your Computer Dell Precision 650 Computer Installing a VRM Inside View of Your Computer Removing a VRM System Board Components Front Panel Inside Your Computer Dell Precision 450 Computer Removing the Front Panel Inside View of Your Computer Replacing the Front Panel System Board Components Chassis Intrusion Switch Drives Dell Precision 650 Computer Removing the Chassis Intrusion Switch Overview Replacing the Chassis Intrusion Switch Hard Drive Control Panel Floppy Drive Control Panel Components CD DVD Drive Removing the Control Panel Drive Door Dell Precision 650 Computer Replacing the Control Panel Removing the Drive Door I O Panel Replacing the Drive Door I O Panel Components for the Dell Precision 650 Computer Drives Dell Precision 450 Computer O Panel Components for the Dell Precision 450 Computer Overview Removing the I O Panel Hard Drive Replacing the 1 0 Panel Floppy Drive Battery CD DVD Drive Power Supply Dell Precision 650 Computer Cards Removing the Power Supply Installing a Card Replacing the Power Supply Removing a Card Power Supply Dell Precision 450 Computer Card Fan
11. One end of this cable attaches to the SCSI controller card The remaining connectors on the cable attach to the various Narrow SCSI devices NOTI CE Dell recommends that you use only SCSI cables purchased from Dell Cables purchased elsewhere are not guaranteed to work with Dell computers Hard Drive A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide NOTICE To avoid damage to the drive do not set it on a hard surface Instead set the drive on a surface such as a foam pad that will sufficiently cushion it Removing a Hard Drive 1 If you are replacing a hard drive that contains data you want to keep back up your files before you begin this procedure 2 Disconnect the power and hard drive cables from the drive power cable 1 hard drive cable 3 Press in on the tabs on each side of the drive and slide the drive up and out Installing a Hard Drive 1 Unpack the replacement hard drive and prepare it for installation 2 Check the documentation for the drive to verify that it is configured for your computer 3 f your replacement hard drive does not have the bracket rails attached remove the rails from the old drive by removing the two screws that secure each rail to the drive Attach the bracket rails to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tighte
12. R 12 auxiliary LED add in storage adapter connector AUX LED CD drive audio cable connector CD_IN 13 standby power light AUX PWR LED ou Back to Contents Page Back to Contents Page Drives Dell Precision 450 Computer Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Overview Hard Drive Floppy Drive CD DVD Drive A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Overview Your computer supports Two hard drives One floppy drive Two CD or DVD drives hard drive s floppy drive s CD DVD drives s I DE Drive Addressing When you connect two IDE devices to a single IDE interface cable and configure them for the cable select setting the device attached to the last connector on the interface cable is the primary master or boot device drive 0 and the device attached to the middle connector on the interface cable is the secondary slave device drive 1 See the drive documentation in your upgrade kit for information on configuring devices for the cable select setting Since cable select is the default setting any additional drives that are installed do not need to be set as a primary or secondary drive Your computer supports up to two IDE devices Hard drives should be connected to the connector labeled IDE1 and CD DVD drives should be connected to the connector
13. SB 2 0 connectors connector 2 system board connector 10 microphone connector speaker connector 11 headphone connector front panel USB IEEE 1394 connector I O Panel Components for the Dell Precision 450 Computer 1 chassis intrusion switch 6 headphone connector connector 2 system board connector USB 2 0 connector 3 USB 2 0 connector 8 USB 2 0 connector 4 front panel audio connector B diagnostic lights 4 l5 control panel connector Removing the I O Panel 1 Remove the front panel 2 Disconnect the control panel cable from the control panel connector 3 Disconnect the front panel cable from the system board 4 Remove all cables that are connected to the front I O panel 5 From inside the cover remove the mounting screw that secures the front I O panel to the computer 6 Remove the front I O panel from the computer Dell Precision 650 Computer Dell Precision 450 Computer Replacing the I O Panel To replace the front I O panel perform the removal procedure in reverse Back to Contents Page Back to Contents Page Inside Your Computer Dell Precision 650 Computer Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Inside View of Your Computer System Board Components A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide A CAUTION To avoid
14. and Dell Precision Workstation 450 Service Manual Recommended Tools Precautionary Measures 3 Protecting Against Electrostatic Discharge This section provides procedures for removing and replacing the components assemblies and subassemblies in the Dell Precision 450 computer and Dell Precision 650 computer Unless otherwise noted each procedure assumes that the following conditions exist You have performed the steps in Precautionary Measures You have read the safety information in your System Information Guide You have opened the computer cover Recommended Tools Your computer is primarily a tool less one but certain procedures such as removing the heat sink blower or the control panel require the use of one or more of the following tools Small flat blade screwdriver 1 and 2 Phillips head screwdrivers An 8 inch 2 Phillips head screwdriver It is recommended that you use a wrist grounding strap as explained in Precautionary Measures Precautionary Measures Use the following safety guidelines to help protect your computer from potential damage and to ensure your own personal safety A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide A CAUTION Do not attempt to service the computer yourself except as explained in your online Dell documentation or in instructions otherwise provided to you by Dell Always follo
15. and ease it out of its connector 5 If you are removing the card permanently install a filler bracket in the empty card slot opening If you need a filler bracket contact Dell K NOTE Installing filler brackets over empty card slot openings is necessary to maintain FCC certification of the computer The brackets also keep dust and dirt out of your computer 6 Lower the retention arm and press it into place securing the card s in the computer NOTI CE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 7 Close the computer cover reconnect the computer and devices to electrical outlets and turn them on 8 Remove the card s driver from the operating system 9 If you removed a sound card a Enter system setup select Integrated Devices and then change the setting for Sound to On b Connect external audio devices to the audio connectors on the computer back panel 10 If you removed an add in network connector enter system setup select I ntegrated Devices and then change the setting for Network I nterface Card to Off 11 Connect the network cable to the integrated connector on the computer back panel Back to Contents Page Back to Contents Page Chassis Intrusion Switch Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual 3 Removing the Chassis Intrusion Switch 3 Replacing the Chassis Intrusion Switch A CAUTION Bef
16. anual Removing the Microprocessor Airflow Shroud Installing the Microprocessor Airflow Shroud A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Removing the Microprocessor Airflow Shroud NOTICE To avoid damaging the fan power cables do not slide the shroud too quickly 1 Press the shroud release lever towards the front of the computer and lift the shroud up to disengage the anchors 2 Once the shroud has been disengaged from the anchors unplug the fan cables from their connectors on the system board shroud release lever 1 I nstalling the Microprocessor Airflow Shroud 1 Attach both fan power cables to the connectors on the system board 2 Align the anchor tabs with the securing slots 3 Gently press the shroud until the anchor tabs snap securely into place 4 Close the computer cover NOTI CE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 5 Connect your computer and devices to electrical outlets and turn them on Back to Contents Page Back to Contents Page Card Fan and Guide Dell Precision 650 Computer Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Removing the Card Fan and Guide Replacing the Card Fan and Guide The Card Fan Guide Removing the Card Fan and Guide A CAUTION Before you begi
17. any cables that should be attached to the card See the documentation for the card for information about the card s cable connections NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 9 Close the computer cover reconnect the computer and devices to electrical outlets and turn them on 10 If you installed a sound card a Enter system setup select Integrated Devices and then change the setting for Sound to Off b Connect external audio devices to the sound card s connectors Do not connect external audio devices to the microphone speaker headphone or line in connectors on the back panel 11 If you installed an add in network connector a Enter system setup select Integrated Devices and then change the setting for Network I nterface Card to Off b Connect the network cable to the add in network connector s connectors Do not connect the network cable to the integrated connector on the back panel 12 Install any drivers required for the card as described in the card documentation Removing a Card 1 Press the lever on the card retention arm and raise the retention arm see Installing a Card 2 If you are removing an AGP card press out on the release tabs and pull the AGP card guide up and off of the base release tabs 2 AGP retention spring 3 If necessary disconnect any cables connected to the card 4 Grasp the card by its top corners
18. are installing an IDE drive configure the drive for the cable select setting 2 Connect the new drive to the set of rails that are attached to the inside of the computer cover If a set of rails is not attached inside the cover contact Dell 3 If you are installing a replacement drive and the new drive does not have the bracket rails attached remove the rails from the old drive by removing the two screws that secure each rail to the drive Attach the bracket to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws two screws on each rail bracket rails 2 4 Gently slide the drive into place until the tabs securely click into position 5 f you are installing a drive that has its own controller card install the controller card in an expansion slot See the documentation that accompanied the drive and controller card to verify that the configuration is correct for your computer 6 Connect the power and CD DVD drive cables to the drive If you are adding a drive that has an audio cable connect the audio cable to the audio connector on the system board 1 audio cable Some drives do not have this cable 7 If you are installing a new CD DVD drive rather than replacing a drive remove the front panel inserts From inside the drive bay gently press on each side of the insert until it pops out 8 Check all cable connections
19. ased c Gently lift the heat sink away from the microprocessor 6 lever 3 Pull the release lever straight up until the microprocessor is released NOTI CE Be careful not to bend any of the pins when you remove the microprocessor from the socket Bending the pins can permanently damage the microprocessor i release lever i2 microprocessor m Socket 4 Remove the microprocessor from the socket If you are replacing the microprocessor leave the release lever extended in the release position so that the socket is ready for the new microprocessor and go to Installing the Microprocessor If you are removing a second microprocessor and not installing another one remove the VRM and then continue with step 9 Replace the airflow shroud for the Dell Precision 650 computer see Microprocessor Airflow Shroud Dell Precision 650 Computer or for the Dell Precision 450 computer see Microprocessor Airflow Shroud Dell Precision 450 Computer 6 Close the computer cover NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 7 Connect your computer and devices to electrical outlets and turn them on Back to Contents Page Back to Contents Page Drives Dell Precision 650 Computer Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Overview Hard Drive Floppy Drive CD DVD Drive A
20. at are attached to the inside of the cover If a set of rails is not attached inside the computer cover contact Dell 3 If you are installing a replacement drive and the new drive does not have the bracket rails attached remove the rails from the old drive by removing the two screws that secure each rail to the drive Attach the bracket to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws two screws on each rail bracket rails 2 4 Gently slide the drive into place until the tabs securely click into position 5 f you are installing a drive that has its own controller card install the controller card in an expansion slot See the documentation that accompanied the drive and controller card to verify that the configuration is correct for your computer 6 Connect the power and CD DVD drive cables to the drive If you are adding a drive that has an audio cable connect the audio cable to the audio connector on the system board power cable audio cable Some drives do not have this cable CD DVD drive cable 7 If you are installing a new CD DVD drive rather than replacing a drive remove the front panel inserts From inside the drive bay gently press on each side of the insert until it pops out 8 Check all cable connections and fold cables out of the way to provide airflow for the fan and cooling vents 9 Close the
21. computer cover NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 10 Connect your computer and devices to electrical outlets and turn them on See the documentation that came with the drive for instructions on installing any software required for drive operation 11 Update your configuration information by setting the appropriate Drive option 0 or 1 under Drives Secondary to Auto See Advanced Features in your User s Guide for more information 12 Verify that your computer works correctly by running the Dell Diagnostics Back to Contents Page Back to Contents Page VRM Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Installing VRM Removing a VRM A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide NOTICE A VRM must be installed to operate dual microprocessors To locate the VRM connector see either the system board components illustration for the Dell Precision 650 computer see System Board Components or for the Dell Precision 450 computer see System Board Components or the system board label inside your computer Installing a VRM 1 Remove the microprocessor airflow shroud for the Dell Precision 650 computer see Microprocessor Airflow Shroud Dell Precision 650 Computer or for the Dell Precision 450 computer
22. connections and fold cables out of the way to provide airflow for the fan and cooling vents 6 Close the computer cover NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 7 Connect your computer and devices to electrical outlets and turn them on See the documentation that came with the drive for instructions on installing any software required for drive operation 8 Enter system setup and update the appropriate Diskette Drive A option to reflect the size and capacity of your new floppy drive 9 To verify that your computer works correctly run the Dell Diagnostics CD DVD Drive A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Removing a CD DVD Drive 1 Disconnect the power and CD DVD drive cables from the back of the drive CD DVD drive cable 2 Press inward on the two tabs on the sides of the drive and then slide the drive upward and remove it from the drive bay BE ANN y X CD DVD drive I nstalling a CD DVD Drive 1 If you are installing a new drive unpack the drive and prepare it for installation Check the documentation that accompanied the drive to verify that the drive is configured for your computer If you are installing an IDE drive configure the drive for the cable select setting 2 Connect the new drive to the set of rails th
23. e Manual Removing the Front Panel Replacing the Front Panel A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Removing the Front Panel 1 Disconnect and remove all disk drives for more information see Drives Dell Precision 650 Computer or Drives Dell Precision 450 Computer 2 Release the front panel by pressing each of the front panel release tabs The Dell Precision 650 computer has seven release tabs and the Dell Precision 450 computer has seven release tabs Dell Precision 650 Computer Dell Precision 450 Computer 3 Close the computer cover halfway and pull the front panel away from the computer Replacing the Front Panel To replace the front panel perform the removal procedure in reverse Back to Contents Page Back to Contents Page I O Panel Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual O Panel Components for the Dell Precision 650 Computer O Panel Components for the Dell Precision 450 Computer Removing the I O Panel Replacing the 1 0 Panel A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide I O Panel Components for the Dell Precision 650 Computer front panel audio connector diagnostic lights 4 control panel connector 8 IEEE 1394 connector chassis intrusion switch U
24. e procedures in this section follow the safety instructions in the System Information Guide A CAUTION To avoid electrical shock always unplug your computer from the electrical outlet before opening the cover NOTICE Be careful when opening the computer cover to ensure that you do not accidentally disconnect cables from the system board Inside View of Your Computer 1 CD DVD drive 6 microprocessor airflow shroud 2 3 hard arive a system board a power suppty o chassis intrusion switch s padiocering Cable Colors Device Cable Color Hard drive Blue pull tab Floppy drive Black pull tab CD DVD drive Orange pull tab O Panel Yellow pull tab System Board Components CD DVD drive connector IDE2 14 PCI card connectors PCI1 PCI2 32 bit connectors and PCI3 64 bit PCI X connector I O panel I O PANEL telephony connector MODEM floppy drive connector DISKETTE 16 AGP Pro card connector AGP memory module connectors DIMM_1 DIMM_2 DIMM_3 VRM connector VRM for a second microprocessor only DIMM_4 suspend to RAM light STR LED microprocessor and heat sink connector CPU 1 power connector POWER 2 front panel audio connector FP2AUDI O power connector POWER 1 microprocessor and heat sink connector CPU 0 microprocessor fan connector FAN P1 22 microprocessor fan connector FAN P0 battery socket BATTERY internal speaker SPK
25. efault SCSI ID numbers are assigned as follows System Board Controller Controller Card Device ome tape or DAT drive SSCS NOTE There is no requirement that SCSI ID numbers be assigned sequentially or that devices be attached to the cable in order by ID number If two or more devices use the same ID your computer may hang during POST and in SCSI BIOS SCSI devices installed by Dell are configured correctly during the manufacturing process You do not need to set the SCSI ID for these SCSI devices If you attach additional optional SCSI devices see the documentation for each device for information about setting the appropriate SCSI ID number NOTICE Dell recommends that you use only SCSI cables purchased from Dell Cables purchased elsewhere are not guaranteed to work with Dell computers Device Termination SCSI logic requires that termination be enabled for the two devices at opposite ends of the SCSI chain and disabled for all devices in between It is recommended that you use terminated cables and that you disable termination on all devices See the documentation provided with any optional SCSI device you purchase for information on disabling termination on the device General Guidelines Follow these general guidelines when installing SCSI devices in your computer Although you install SCSI devices essentially the same way as other devices their configuration requirements are different For details on configuring yo
26. electrical shock always unplug your computer from the electrical outlet before opening the cover NOTICE Be careful when opening the computer cover to ensure that you do not accidentally disconnect cables from the system board Inside View of Your Computer 1 floppy drive 5 padlock ring 2 CD DVD drive 6 microprocessor airflow shroud a power supply chassis intrusion switch Cable Colors Device Cable Color Hard drive Blue pull tab Floppy drive Black pull tab CD DVD drive Orange pull tab I O Panel Yellow pull tab System Board Components 4 5 amp ry 8 9 10 11 DTTA io rrr rre A i n i 1 1 Eao 22 21 20 19 CD DVD drive connector IDE2 15 standby power light AUX PWR LED I O panel connector I O PANEL PCI card connectors PCI1 PCI2 32 bit connectors PCI3 PCI4 and PCI5 64 bit PCI X connectors floppy drive connector DISKETTE telephony connector MODEM memory module connectors DIMM 1 DIMM 2 DIMM 3 AGP Pro card connector AGP DIMM 4 T T r T 14 auxiliary LED add in storage adapter connector AUX LED Back to Contents Page Back to Contents Page Closing the Computer Cover Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual 1 Ensure that all cables are connected and fold cables out of the way 2 Ensure that no tools or extra parts are
27. ents Page Microprocessor Airflow Shroud Dell Precision 650 Computer Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Removing the Microprocessor Airflow Shroud Installing the Microprocessor Airflow Shroud A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Removing the Microprocessor Airflow Shroud 1 Press down and back on the indentations at the top corners of the shroud The top anchor tabs disengage from the anchor slots 2 Lift the airflow shroud out of the computer Installing the Microprocessor Airflow Shroud 1 Insert the bottom anchor tabs into the anchor slots 2 Align and insert the side anchor tabs into the anchor slots 3 Press the indentations until the top anchor tabs on the shroud snap securely into place 4 Close the computer cover NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 5 Connect your computer and devices to electrical outlets and turn them on Back to Contents Page Back to Contents Page Power Supply Dell Precision 650 Computer Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Removing the Power Supply Replacing the Power Supply A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the Syste
28. eplacing a drive remove the front panel inserts From inside the drive bay gently press on each side of the insert until it pops out 5 Check all cable connections and fold cables out of the way to provide airflow for the fan and cooling vents 6 Close the computer cover NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 7 Connect your computer and devices to electrical outlets and turn them on See the documentation that came with the drive for instructions on installing any software required for drive operation 8 Enter system setup and update the appropriate Diskette Drive A option to reflect the size and capacity of your new floppy drive 9 To verify that your computer works correctly run the Dell Diagnostics CD DVD Drive A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Removing a CD DVD Drive 1 Disconnect the power and CD DVD drive cables from the back of the drive CD DVD drive cable 2 Press inward on the two tabs on the sides of the drive and then slide the drive upward and remove it from the drive bay tabs 2 Installing a CD DVD Drive 1 If you are installing a new drive unpack the drive and prepare it for installation Check the documentation that accompanied the drive to verify that the drive is configured for your computer If you
29. es to the SCSI controller card The remaining connectors on the cable attach to the various Narrow SCSI devices NOTICE Dell recommends that you use only SCSI cables purchased from Dell Cables purchased elsewhere are not guaranteed to work with Dell computers Hard Drive A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide NOTICE To avoid damage to the drive do not set it on a hard surface Instead set the drive on a surface such as a foam pad that will sufficiently cushion it Removing a Hard Drive 1 If you are replacing a hard drive that contains data you want to keep back up your files before you begin this procedure 2 Disconnect the power and hard drive cables from the drive 1 hard drive cable T 3 Press in on the tabs on each side of the drive and slide the drive up and out Installing a Hard Drive 1 Unpack the replacement hard drive and prepare it for installation 2 Check the documentation for the drive to verify that it is configured for your computer 3 If your replacement hard drive does not have the bracket rails attached remove the rails from the old drive by removing the two screws that secure each rail to the drive Attach the bracket rails to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws two screws on each
30. facturer s instructions K NOTE If you have not already done so make a copy of your configuration information found in system setup To replace the battery 1 Locate the battery socket For the Dell Precision 450 computer see System Board Components or for the Dell Precision 650 computer see System Board Components or see the system board label inside your computer NOTICE If you pry the battery out of its socket with a blunt object be careful not to touch the system board with the object Ensure that the object is inserted between the battery and the socket before you attempt to pry out the battery Otherwise you may damage the system board by prying off the socket or by breaking circuit traces on the system board 2 Remove the battery by carefully prying it out of its socket with your fingers or with a blunt nonconducting object such as a plastic screwdriver 3 Insert the new battery into the socket with the side labeled facing up and snap the battery into place NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 4 Close the computer cover and plug your computer and devices into electrical outlets 5 Enter system setup and restore the settings 6 Properly dispose of the old battery For more information see your System Information Guide Back to Contents Page Back to Contents Page Before You Begin Dell Precision Workstation 650
31. for instructions 15 Test the hard drive by running the Dell Diagnostics 16 If the drive you just installed is the primary drive install your operating system on the hard drive Floppy Drive A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Removing a Floppy Drive 1 Disconnect the power and floppy drive cables from the back of the floppy drive power cable floppy drive cable 2 Press inward on the two tabs on the sides of the drive slide the drive upward and remove it from the floppy drive bay floppy drive Installing a Floppy Drive 1 If you are replacing a drive and the the new drive does not have the bracket rails attached remove the rails from the old drive by removing the two screws that secure each rail to the drive Attach the bracket to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws two screws on each rail bracket rails 2 2 Gently slide the drive into place until the tabs securely click into position 3 Attach the power and floppy drive cables to the floppy drive floppy drive cable 4 f you are installing a new floppy drive rather than replacing a drive remove the front panel inserts From inside the drive bay gently press on each side of the insert until it pops out 5 Check all cable
32. he procedures in this section follow the safety instructions in the System Information Guide Control Panel Components Removing the Control Panel NOTICE Before disconnecting a device from the computer or removing a component from the system board verify that the standby power light on the system board has turned off To locate this light on the Dell Precision 650 computer see System Board Components or on the Dell Precision 450 computer see System Board Components 1 Remove the front panel 2 Disconnect the control panel cable from the I O panel connector 3 Disconnect the I O panel cable from the connector on the system board To locate the system board connector on the Dell Precision 650 computer see System Board Components or on the Dell Precision 450 computer see System Board Components 4 Remove the mounting screw from the control panel 5 Lift the control panel away from the computer Dell Precision 650 Computer control panel mounting screw Dell Precision 450 Computer MELE control panel 1 Replacing the Control Panel To replace the control panel perform the removal procedure in reverse Back to Contents Page Back to Contents Page Inside Your Computer Dell Precision 450 Computer Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Inside View of Your Computer System Board Components A CAUTION Before you begin any of th
33. he system board 2 Lift the handle on the power supply 3 While pressing the release button slide the power supply toward the front of the computer 1 2 power supply handle 4 Lift the power supply away from the computer Replacing the Power Supply 1 Insert the power supply securing tabs into the power supply securing slot on the computer ensuring that each securing tab is connected to its slot on the computer 2 Slide the power supply toward the back of the computer 3 Connect the power supply cables 4 Close the computer cover and restart the computer Back to Contents Page Back to Contents Page Drive Door Dell Precision 650 Computer Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Removing the Drive Door Replacing the Drive Door A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Removing the Drive Door 1 Open the drive door 2 Unsnap the top hinge and pull the top of the drive door outward away from the computer 1 top hinge 3 Lift the bottom hinge away from the computer Replacing the Drive Door To replace the drive door perform the removal procedure in reverse Back to Contents Page Back to Contents Page Microprocessor Airflow Shroud Dell Precision 450 Computer Dell Precision Workstation 650 and Dell Precision Workstation 450 Service M
34. ing clips at each end of the connector outward simultaneously until the VRM slightly pops out from the connector uw Grasp the VRM by its top corners and ease it out of the connector 4 f you are installing a new VRM see Installing a VRM If you are not installing a new VRM continue with step 5 5 Install the microprocessor airflow shroud for the Dell Precision 650 computer see Microprocessor Airflow Shroud Dell Precision 650 Computer or for the Dell Precision 450 computer see Microprocessor Airflow Shroud Dell Precision 450 Computer 6 Close the computer cover NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 7 Connect your computer and devices to electrical outlets and turn them on Back to Contents Page Back to Contents Page Memory Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Memory Installation Guidelines Removing a Memory Module Adding a Memory Module A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide You can increase your computer memory by installing memory modules on the system board For information on the type of memory supported by your computer see Specifications in your User s Guide Memory Installation Guidelines Memory module connectors must be upgraded in matched pairs Mem
35. ion Workstation 650 and Dell Precision Workstation 450 Service Manual Installing a Card Removing a Card A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Your Dell computer provides slots for PCI PCI X and AGP cards For more information see Specifications in your User s Guide or the system board components illustration for your computer K NOTE To meet PC99 requirements your Dell computer uses only PCI slots ISA cards are not supported If you are installing or replacing a card follow the procedures in the next section If you are removing but not replacing a card see Removing a Card I nstalling a Card 1 Press the lever on the card retention arm and raise the retention arm 2 If you are installing a new card remove the filler bracket to create a card slot opening Then continue with step 4 3 If you are replacing a card that is already installed in the computer remove the card If necessary disconnect any cables connected to the card Grasp the card by its top corners and ease it out of its connector 4 Prepare the card for installation See the documentation that came with the card for information on configuring the card making internal connections or otherwise customizing it for your computer A CAUTION Some network connectors automatically start the computer when they are connected to a network To guard again
36. k assembly can get hot To avoid burns ensure that the package and assembly have had sufficient time to cool before you touch them b Remove the heat sink assembly and microprocessor from the existing system board and transfer them to the replacement system board 2 Configure the settings of the replacement system board 3 Set the jumpers on the replacement system board so they are identical to the ones on the existing board K NOTE Some components and connectors on the replacement system board may be in different locations than the corresponding connectors on the existing system board 4 Orient the replacement board by aligning the notches on the bottom of the board with the tabs on the computer 5 Slide the system board assembly toward the back of the computer until the assembly clicks into position 6 Replace any components and cables that you removed from the system board Back to Contents Page
37. labeled IDE2 Connecting Drive Cables When you install a drive you connect two cables a DC power cable and an interface cable to the back of the drive power input connector interface connector 1 colored stripe on cable interface cable Most interface connectors are keyed for correct insertion that is a notch or a missing pin on one connector matches a tab or a filled in hole on the other connector Keyed connectors ensure that the pin 1 wire in the cable indicated by the colored stripe along one edge of the cable goes to the pin 1 end of the connector The pin 1 end of a connector on a board or a card is usually indicated by a silk screened 1 printed directly on the board or card NOTICE When you connect an interface cable do not place the colored stripe away from pin 1 of the connector Reversing the cable prevents the drive from operating and could damage the controller the drive or both SCSI Device Installation Guidelines This section describes how to configure and install SCSI devices in your computer SCSI I D Numbers Internal SCSI devices must have a unique SCSI ID number from 0 to 15 If you are using the SCSI connector on the system board and a SCSI controller card installed in your computer you have two separate SCSI buses operating Each SCSI bus has a set of SCSI ID numbers from 0 to 15 When SCSI devices are shipped from the factory the default SCSI ID numbers are assigned as follows System
38. m Information Guide Removing the Power Supply NOTICE Before disconnecting a device from the computer wait 10 to 20 seconds after disconnecting the computer from its electrical outlet Before removing a component from the system board verify that the standby power light on the system board has turned off To locate this light see System Board Components 1 Remove the cards and the card fan 2 Disconnect the power supply cables and the card fan cable 3 Remove the card fan guide a Pull up on the fan guide release button b Slide the card fan guide to the right c Lift the card fan guide out of the four securing slots in the computer 4 While pressing the power supply release button slide the power supply toward the back of the computer 1 power supply 2 power supply securing tab 5 3 power supply release button 5 Lift the power supply away from the computer 6 Slide the power supply cables out of the computer through the hole Replacing the Power Supply 1 Slide the power supply cables through the hole into the computer N Insert the power supply securing tabs into the power supply securing slot on the computer ensuring that each securing tab is connected to its slot on the computer 3 Slide the power supply toward the front of the computer 4 Install the card fan guide a Place the card fan guide into the four securing slots in the computer b Slide the card fan guide
39. n any of the procedures in this section follow the safety instructions in the System Information Guide NOTICE Before disconnecting a device from the computer or removing a component from the system board verify that the standby power light on the system board has turned off To locate this light see System Board Components 1 Disconnect the fan power cable from its connector on the system board To locate this connector see System Board Components 2 Press the release tabs outward from the card fan guide and lift the fan up and out of the guide Replacing the Card Fan and Guide NOTICE Ensure that the fan is properly installed on the guide When the fan is properly installed the fan manufacturer label faces the expansion card guide and the fan power cable extends toward the system board Insert the bottom of the fan into the clips on the card fan guide Then press the top of the fan toward the card fan guide until the tabs on the card fan guide grasp the fan See Removing the Card Fan and Guide The Card Fan Guide If you need to remove the card fan guide pull up on the card fan guide release button and slide the guide up and out of the computer To replace the card fan guide insert the card fan guide anchor tabs into the slots on the computer and slide the guide into position Back to Contents Page Back to Contents Page Front Panel Dell Precision Workstation 650 and Dell Precision Workstation 450 Servic
40. ning all four screws two screws on each rail bracket rails 2 4 Gently slide the drive into place until the tabs securely click into position 5 f you are installing a drive that has its own controller card install the controller card in an expansion slot See the documentation that accompanied the drive and controller card to verify that the configuration is correct for your computer o NOTI CE Match the colored strip on the cable with pin 1 on the drive pin 1 is marked as 1 6 Connect the power and hard drive cables to the drive power cable hard drive cable 7 Check all connectors to be certain that they are properly cabled and firmly seated 8 Close the computer cover NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 9 Connect your computer and devices to electrical outlets and turn them on See the documentation that came with the drive for instructions on installing any software required for drive operation 10 If the drive you just installed is the primary drive insert a bootable floppy disk into drive A 11 Turn on the computer 12 Enter system setup and update the your drive configuration 13 After you have updated the system settings exit system setup and restart the computer 14 Partition and logically format your drive before you proceed to the next step See the documentation for your operating system
41. or the Dell Precision 650 computer see Microprocessor Airflow Shroud Dell Precision 650 Computer or for the Dell Precision 450 computer see Microprocessor Airflow Shroud Dell Precision 450 Computer 12 Close the computer cover o NOTI CE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 13 Connect your computer and devices to electrical outlets and turn them on Removing the Microprocessor K NOTE It is recommended that only a technically knowledgeable person perform this procedure A CAUTION The processor can get very hot during normal operation Ensure that the processor has had sufficient time to cool before you touch it 1 Remove the microprocessor airflow shroud for the Dell Precision 650 computer see Microprocessor Airflow Shroud Dell Precision 650 Computer or for the Dell Precision 450 computer see Microprocessor Airflow Shroud Dell Precision 450 Computer NOTICE If you are installing a microprocessor upgrade kit from Dell discard the original heat sink If you are not installing a microprocessor upgrade kit from Dell reuse the original heat sink when you install your new microprocessor 2 Remove the microprocessor heat sink a Remove the two retention module clips by pressing the tabs together and lifting the retention module clips up b Press the lever on the retention module until the heat sink is rele
42. ore you begin any of the procedures in this section follow the safety instructions in the System Information Guide Removing the Chassis Intrusion Switch NOTICE Before disconnecting a device from the computer or removing a component from the system board verify that the standby power light on the system board has turned off To locate this light on the Dell Precision 650 computer see System Board Components or on the Dell Precision 450 computer see System Board Components 1 Remove the front panel 2 Disconnect the chassis intrusion switch cable from the O Panel connector 3 Feed the chassis intrusion switch cable through the routing holes in the drive door and the front of the computer K NOTE On the Dell Precision 650 you must open the drive door to feed the chassis intrusion switch cable through the routing holes 4 Slide the chassis intrusion switch up out of its slot 5 Lift both the chassis intrusion switch and the switch cable away from the computer Dell Precision 650 Computer Dell Precision 450 Computer Replacing the Chassis I ntrusion Switch To replace the chassis intrusion switch perform the removal procedure in reverse Back to Contents Page Back to Contents Page Control Panel Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Control Panel Components Removing the Control Panel Replacing the Control Panel A CAUTION Before you begin any of t
43. ory module connectors 1 and 2 must contain modules of identical size type speed and number of chips and memory module connectors 3 and 4 must contain modules of identical size type speed and number of chips To locate the memory sockets on the system board see the system board components illustration for the Dell Precision 450 computer see System Board Components or for the Dell Precision 650 computer see System Board Components or the system board label inside your computer Before you install new memory modules download the most recent BIOS for your computer from the Dell Support website at support dell com Memory Module Label 8 Ww E S Addressing Memory With 4 GB Configurations Your computer supports a maximum of 4GB of memory when using four 1 GB DIMMs Current operating systems such as Microsoft Windows 2000 and Windows XP can only utilize a maximum of 4 GB of address space however the amount of memory available to the operating system is slightly less than 4 GB Certain components within the computer require address space in the 4 GB range Any address space reserved for these components cannot be used by computer memory The following is a list of components that require memory address space System ROM APIC s Integrated PCI devices such as network connector SCSI controller and IEEE 1394 controller PCI and AGP cards The AGP Aperture size specified in system setup At start up the
44. processor correctly in the socket to avoid permanent damage to the microprocessor and the computer 2 If the release lever is not extended to the release position move it to that position 3 Align pin 1 the imprinted corner of the microprocessor and pin 1 of the socket NOTICE Microprocessor pins are delicate To avoid damage ensure that the microprocessor aligns properly with the socket and do not use excessive force when you install the processor 4 Carefully set the microprocessor in the socket and press it down lightly to seat it 5 Rotate the release lever back toward the system board until it snaps into place securing the microprocessor 1 microprocessor pin 1 indicator 2 release lever 3 microprocessor 4 microprocessor socket 5 socket pin 1 indicator 6 Remove the thermal grease protective cover and place the heat sink in the base 7 Place one end of the heat sink under the tab on the retention module on the side opposite the lever Lower the heat sink onto the microprocessor so that the heat sink fits securely under the tab on the other end of the retention module 8 Replace the retention module clips 9 f you installed a microprocessor replacement kit from Dell return the original heat sink assembly and microprocessor to Dell in the same package in which your replacement kit was sent 10 If you are installing a second microprocessor install the VRM 11 Replace the airflow shroud f
45. r your SCSI devices and or your host adapter card Configure the device for a SCSI ID number and disable termination if necessary To use an external SCSI device you must have a SCSI controller card installed in your computer Connect one end of the external SCSI cable to the connector on the back of the SCSI device Attach the other end of the external SCSI cable to the connector on the controller card installed in the computer After you install a SCSI hard drive Primary Drive O and Primary Drive 1 should be set to None in system setup if no IDE hard drives are installed If you have any EIDE devices on the second IDE channel such as a CD or tape drive Secondary Drive 0 and or Secondary Drive 1 should be set to Auto You may need to use programs other than those provided with the operating system to partition and format SCSI hard drives See the documentation that came with your SCSI software drivers for information on installing the appropriate drivers and preparing your SCSI hard drive for use SCSI Cables Ultra 320 optional on the Dell Precision 450 computer Ultra 160 m and Ultra2 Wide LVD drives typically hard drives both use a 68 pin cable One end of the cable attaches to the SCSI connector on the SCSI controller card installed in your computer The remaining connectors on the cable attach to the various drives Narrow SCSI drives tape drives CD drives and some hard drives use a 50 pin cable One end of this cable attach
46. rail bracket rails 2 4 Gently slide the drive into place until the tabs securely click into position NOTE If you are installing a hard drive in the lower bay the drive should be placed in the bay so that the power connector is on the left hand side opposite of the top hard drive 5 f you are installing a drive that has its own controller card install the controller card in an expansion slot See the documentation that accompanied the drive and controller card to verify that the configuration is correct for your computer NOTICE Match the colored strip on the cable with pin 1 on the drive pin 1 is marked as 1 6 Connect the power and hard drive cables to the drive hard drive cable 7 Check all connectors to be certain that they are properly cabled and firmly seated 8 Close the computer cover NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 9 Connect your computer and devices to electrical outlets and turn them on See the documentation that came with the drive for instructions on installing any software required for drive operation 10 If the drive you just installed is the primary drive insert a bootable floppy disk into drive A 11 Turn on the computer 12 Enter system setup and update the your drive configuration 13 After you have updated the system settings exit system setup and restart the computer
47. rectly the securing clips snap into the cutouts at each end of the module When the memory module is properly seated in the socket the securing clips on the memory module socket should align with the securing clips on the other sockets with memory modules installed 5 Close the computer cover NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 6 Connect your computer and devices to electrical outlets and turn them on The computer detects that the new memory does not match the existing configuration information and generates the following message X The amount of system memory has changed Strike the Fl key to continue F2 to run the setup utility 7 Press F2 to enter system setup and check the value for System Memory The computer should have changed the value of System Memory to reflect the newly installed memory Verify the new total If it is correct skip to step 10 8 Ifthe memory total is incorrect turn off and disconnect your computer and devices from electrical outlets 9 Open the computer cover and check the installed memory modules to ensure that they are seated properly in their sockets Then repeat steps step 4 through step 7 10 When the System Memory total is correct press lt Esc gt to exit system setup 11 Run the Dell Diagnostics to verify that the memory modules are operating properly Back to Contents Page Back to Cont
48. see Microprocessor Airflow Shroud Dell Precision 450 Computer 2 Press the securing clips at each end of the VRM connector outward until they snap open To locate the VRM connector see the system board components illustration for the Dell Precision 650 computer see System Board Components or for the Dell Precision 450 computer see System Board Components or see the system board label inside your computer securing clips 2 connector 3 Align the notch on the bottom of the VRM with the ridges inside the connector 4 Press the VRM straight down into the connector until the securing clips snap into place at the ends of the module 5 Install the microprocessor airflow shroud for the Dell Precision 650 computer see Microprocessor Airflow Shroud Dell Precision 650 Computer or for the Dell Precision 450 computer see Microprocessor Airflow Shroud Dell Precision 450 Computer 6 Close the computer cover NOTICE To connect a network cable first plug the cable into the network wall jack and then plug it into the computer 7 Connect your computer and devices to electrical outlets and turn them on Removing a VRM 1 Remove the microprocessor airflow shroud for the Dell Precision 650 computer see Microprocessor Airflow Shroud Dell Precision 650 Computer or for the Dell Precision 450 computer see Microprocessor Airflow Shroud Dell Precision 450 Computer 2 Press the secur
49. st electrical shock be sure to unplug your computer from its electrical outlet before installing any cards Verify that the standby power light on the system board is off To locate this light see the system board illustration for the Dell Precision 450 computer see System Board Components or for the Dell Precision 650 computer see System Board Components 5 Place the card in the connector and press down firmly Ensure that the card is fully seated in the slot If the card is full length insert the end of the card into the card guide bracket as you lower the card toward its connector on the system board Insert the card firmly into the card connector on the system board fully seated card bracket caught outside of slot 6 Before you lower the retention arm ensure that The tops of all cards and filler brackets are flush with the alignment bar The notch in the top of the card or filler bracket fits around the alignment guide Press the arm into place securing the card s in the computer filler bracket alignment bar alignment guide 7 f you are replacing an AGP card align the AGP card guide with the base and press down on the indentation until the guide stops at the top of the AGP card AGP retention spring NOTICE Do not route card cables over or behind the cards Cables routed over the cards can prevent the computer cover from closing properly or cause damage to the equipment 8 Connect
50. that both connectors are correctly oriented and aligned Handle components and cards with care Do not touch the components or contacts on a card Hold a card by its edges or by its metal mounting bracket Hold a component such as a microprocessor chip by its edges not by its pins Protecting Against Electrostatic Discharge Static electricity can harm delicate components inside your computer To prevent static damage discharge static electricity from your body before you touch any of your computer s electronic components such as the microprocessor You can do so by touching an unpainted metal surface on the computer chassis As you continue to work inside the computer periodically touch an unpainted metal surface to remove any static charge your body may have accumulated You can also take the following steps to prevent damage from electrostatic discharge ESD When unpacking a static sensitive component from its shipping carton do not remove the component from the antistatic packing material until you are ready to install the component in your computer J ust before unwrapping the antistatic packaging be sure to discharge static electricity from your body When transporting a sensitive component first place it in an antistatic container or packaging Handle all sensitive components in a static safe area If possible use antistatic floor pads and workbench pads Back to Contents Page Back to Contents Page Cards Dell Precis
51. the cover release latch toward the top of the computer b Raise the cover and pivot it toward the front of the computer 3 Ground yourself by touching an unpainted metal surface on the computer such as the metal at the back of computer before touching anything inside your computer While you work periodically touch any unpainted metal surface on the computer to dissipate any static electricity that could harm internal components Dell Precision 650 Computer cover release latch security cable slot padlock ring Dell Precision 450 Computer security cable slot cover release latch padlock ring Back to Contents Page Back to Contents Page Microprocessor Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Installation Guidelines Installing the Microprocessor Removing the Microprocessor A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide Installation Guidelines Your computer is designed for dual processor operations The heat sinks CPU 0 and CPU 1 are keyed to fit their specific connector For single processor operations the processor must be installed in socket CPU_0 The VRM for the single processor is already installed and cannot be removed Processor socket 1 and VRM connector 1 must be empty To locate these components see the system board components illustration for the Dell Precision
52. the other connector Keyed connectors ensure that the pin 1 wire in the cable indicated by the colored stripe along one edge of the cable goes to the pin 1 end of the connector The pin 1 end of a connector on a board or a card is usually indicated by a silk screened 1 printed directly on the board or card NOTICE When you connect an interface cable do not place the colored stripe away from pin 1 of the connector Reversing the cable prevents the drive from operating and could damage the controller the drive or both SCSI Device Installation Guidelines This section describes how to configure and install SCSI devices in your computer To install a SCSI device you can use one or both of the following SCSI controllers The SCSI connector on the system board To locate the SCSI system board connector see the system board illustration see System Board Components or the interior service label K NOTE The system board SCSI controller supports hard drives only Do not connect CD or DVD drives tape drives DAT drives and so on A SCSI controller card installed in your computer SCSI ID Numbers Internal SCSI devices must have a unique SCSI ID number from 0 to 15 If you are using the SCSI connector on the system board and a SCSI controller card installed in your computer you have two separate SCSI buses operating Each SCSI bus has a set of SCSI ID numbers from 0 to 15 When SCSI devices are shipped from the factory the d
53. to the left until it locks into position 5 Connect the power supply cables and the card fan cable 6 Replace the card fan 7 Install the cards 8 Close the computer cover and restart the computer Back to Contents Page Back to Contents Page System Board Dell Precision Workstation 650 and Dell Precision Workstation 450 Service Manual Removing the System Board Replacing the System Board A CAUTION Before you begin any of the procedures in this section follow the safety instructions in the System Information Guide NOTICE The system board and metal tray are connected and are removed as one piece Removing the System Board 1 Remove any components that restrict access to the system board 2 Disconnect all cables from the system board 3 Before you remove the existing system board assembly visually compare the replacement system board to the existing system board to make sure that you have the correct part 4 Remove the system board screw 5 Pull up on the two tabs slide the system board assembly toward the front of the computer and then lift the asembly up and away 6 Place the system board assembly that you just removed next to the replacement system board Replacing the System Board 1 Transfer components from the existing system board to the replacement system board a Remove the memory modules and install them on the replacement board A CAUTION The microprocessor package and heat sin
54. ur particular SCSI subsystem see the documentation for your SCSI devices and or your host adapter card Configure the device for a SCSI ID number and disable termination if necessary To use an external SCSI device you must have a SCSI controller card installed in your computer Connect one end of the external SCSI cable to the connector on the back of the SCSI device Attach the other end of the external SCSI cable to the connector on the controller card installed in the computer After you install a SCSI hard drive Primary Drive O and Primary Drive 1 should be set to None in system setup if no IDE hard drives are installed If you have any EIDE devices on the second IDE channel such as a CD or tape drive Secondary Drive 0 and or Secondary Drive 1 should be set to Auto You may need to use programs other than those provided with the operating system to partition and format SCSI hard drives See the documentation that came with your SCSI software drivers for information on installing the appropriate drivers and preparing your SCSI hard drive for use SCSI Cables Ultra 320 Ultra 160 m and Ultra2 Wide LVD drives typically hard drives both use a 68 pin cable One end of the cable attaches to the SCSI connector on the system board or the SCSI controller card installed in your computer The remaining connectors on the cable attach to the various drives Narrow SCSI drives tape drives CD drives and some hard drives use a 50 pin cable
55. w installation and service instructions closely NOTICE To help avoid possible damage to the system board wait 5 seconds or wait until the standby light is extinguished after turning off the computer and unplugging the power cable before removing a component from the system board or disconnecting a device from the computer Before you start to work on the computer perform the following steps in the sequence listed 1 Shut down the computer through the Start menu 2 Ensure that your computer and attached devices are turned off If your computer and attached devices did not automatically turn off when you shut down your computer turn them off now NOTICE To disconnect a network cable first unplug the cable from your computer and then unplug it from the network wall jack 3 Disconnect any telephone or telecommunication lines from the computer 4 Disconnect your computer and all attached devices from electrical outlets and then press the power button to ground the system board In addition take note of these safety guidelines when appropriate When you disconnect a cable pull on its connector or on its strain relief loop not on the cable itself Some cables have a connector with locking tabs if you are disconnecting this type of cable press in on the locking tabs before disconnecting the cable As you pull connectors apart keep them evenly aligned to avoid bending any connector pins Also before you connect a cable ensure

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