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1. 5 25 inch drive 3 8 VDC FR GND 488 4 PWRGOOD RES nch e drive 12 VDC e power 5 VDC supply M 4 5 VDC 3 5 inch drives e second drive 5 VDC e uses Y cable GND 2 5 VSB 3 5 inch 5 inc PSON e diskette drive P4 primary hard disk drive power O switch hard disk drive uses Y cable 1 7 9901 POWER J7M1 PSON battery e e GND 1 AH 5 VSB m 5 VDC ISA J7J2 GND GND connectors 5 VDC 5 VDC Ibe J7J1 GND 5 VDC 12VDC 5 VDC 4 connectors J6J2 GND 12 VDC 5 VDC GND 4 J6J1 re fuse GND 5 VDC KEYBRD eq M GND 5 VDC MOUSE 2 1 2 8V 1 5 V e converter converter GND fuse e use 2 1 2 8 e GND 1 5 12 VDC J8L1 logic GND M system board Figure 1 6 DC Power Distribution 1 10 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Power Connector Pin Assignments The power supply output voltages can be measured at the back wire side of the DC power connectors without disconnecting them Figures 1 7 through 1 9 show the wire side of the connectors
2. 3 3 Chapter 4 Removing and Replacing Parts 4 1 Precautionary 4 1 Computer Cover ss neis pev ER CRURA 4 2 Front Bezel eee s et 4 3 MOT CS LE ML LA RI DM EA CAL 4 4 Front Panel Insert 200449 sey ARN EARN EXE OES 4 4 Dhu cio cp Dco rc 4 5 3 2 Ss Ine DEVE e esteem ar abest rm ad eeu e 4 6 Upper 3 5 Inch DEVE co eor eae at 4 7 Lower 3 5 Inch Drive Mini Tower Computer Only 4 8 3 5 Inch Diskette Drive ss euet Lex Svp ae ewes Se MUR MET 4 9 Primary Hard Disk 4 10 Secondary Hard Disk 4 11 Power Supply eed x epee a hn E AI 4 13 Microprocessor Fan 4 14 Card Guide Assembly 4 15 Control Panel Boards covey dana 4 16 System Board Components 4 17 Cans ca costas see oc PA C M LLLA EE ELLA 4 18 SIMMS Dope VR D BRM REE GH 4 19 SEC Cartridge and Heat Sink Assembly 4 20 Ballet Yes esc bete otim road bes Es I eh Ed pet pra qe 4 21
3. 1 11 DC Power Connectors P2 P3 P4 P5 and P6 1 12 DC Power Connector 7 1 12 System Board 1 13 System Board 1 14 Computer Cover 1 4 2 Front Bezel Removal Mini Tower Chassis 4 3 Front Bezel Removal Desktop 5515 4 3 Front Panel Insert 1 4 4 Drive Cage 1 4 5 5 25 Inch Drive 4 6 Upper 3 5 Inch Drive Removal 4 7 Lower 3 5 Inch Drive Removal Mini Tower Computer 4 8 3 5 Inch Diskette Drive Removal 4 9 Primary Hard Disk Drive Removal 4 10 Secondary Hard Disk Drive Assembly Removal 4 11 Secondary Hard Disk Drive 1 4 12 Power Supply 1 4 13 vii viii Figure 4 14 Figure 4 15 Figure 4 16 Figure 4 17 Figure 4 18 Figure 4 19 Figure 4 20 Figure 4 21 Figure 4 22 Figure 4 23 Figure 4 24 Figure 4 25 Figure A 1 Figure A 2 Figure A 3 Figure A 4 Figure A 5 Figure A 6 Figure A 7 Figure A 8 Figure A 9 Figure A 10 Tables Table 1 1 Table 1 2 Table 1 3 Table 1 4 Table 1 5 Ta
4. 44 45 cm 17 5 inches Weight occ 11 3 to 13 6 kg 25 to 30 Ib Environmental Temperature Operating 10 to 35 C 50 to 95 F Storage Sy he heels 40 to 65 C 40 to 149 F Relative humidity 20 to 80 noncondensing Maximum vibration Operating 0 25 G at 3 to 200 Hz at 2 octaves minute Stotage Nt 0 50 G at 3 to 200 Hz at 2 octaves minute System Overview 1 21 Table 1 5 Technical Specifications continued Environmental continued Maximum shock Operating left side for mini tower orientation and bottom half sine pulse with a change in velocity of 50 8 cm sec 20 inches sec Storage 23 G faired square wave with a velocity change of 508 0 cm sec 200 inches sec Altitude Operating 16 to 3048 m 50 to 10 000 ft Storad da 16 to 10 600 m 50 to 35 000 ft 1 22 Dell Dimension XPS H233 and XPS H266 Systems Service Manual This chapter describes basic troubleshooting procedures that can help you diagnose a computer system problem These procedures can often reveal the source of a problem or indicate the correct starting point for troubleshooting the system A brief explanation of how to load and start the diagnostics 15 provided in Running the Diagnostics at the end of this chapter Dell recommends that you perform these proce
5. 1 7 Compiler Service uice Rer eaae Soi SCR a 1 8 Power Supply oec owe ates VA EO 1 8 DC Power 1 1 9 DC Power Connector Pin Assignments 1 11 systemoBoa sse 5 is bas 1 13 Memory tee tiraia 1 13 System Board 1 14 Interrupt Assignments oce ex sor ve SN EFE UTS NOE E pd 1 16 DMA Channel 1 1 17 Technical 1 18 Chapter 2 Basic 2 1 IniGal User Contacte De a A OUR AOE ha ae 2 1 External Visual Inspection 2 2 Observing the Boot 2 3 Internal Visual 2 4 Eliminating Resource Conflicts 2 5 Running the Diagnostics y ONE ex eek 2 6 od Lacs od 2 6 vi Chapter 3 Beep Codes and Error 55 5 3 1 POST Codes iis terer baa woes FS XE RM eX eee Ro 3 1 System Error Messages
6. Table 1 5 Technical Specifications Microprocessor Microprocessor type Intel Pentium II microprocessor with MMX technology Microprocessor speeds 233 MHz internally 66 MHz externally 266 MHz internally 66 MHz externally Compatibility speeds can be set through the system setup program all cache memory is disabled to simulate compati bility speed Internal cache 32 KB Math coprocessor internal to Pentium microprocessor with MMX technology System Information System chip set Intel 440FX PCIset Data bus width 64 bits Address bus width 32 bits DMA channels seven Interrupt levels 15 System BIOS chip 256 KB Expansion Bus Bus Types s Dy ISA and PCI PCIspecification complies with PCI specification 2 1 PCI bus frequency 33 MHz ISA bus frequency 8 25 MHz ISA expansion card three one connector shares card slot opening with PCI expansion card connector PCI expansion card four connector shares card slot opening with ISA expansion card connector 1 18 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Table 1 5 Technical Specifications continued System Clocks System clock frequency 66 MHz matches external processor speed
7. Press Enter F1 Help Tl Select Item ESC Back Select Menu Figure A 10 Exit Screen Change Values Setup Defaults Enter Execute Command F10 Previous Values Table A 10 Exit Screen Categories Category Function Exit Saving Changes Saves any changes you have made exits the system setup program and restarts the system Exit Discarding Changes Discards any changes you have made exits the system setup program and restarts the system Load Setup Defaults Discards any changes you have made reverts all categories to their original default settings but does not exit the system setup program Discard Changes Discards any changes you have made reverts all categories to their last saved settings but does not exit the system setup program Save Changes Saves any changes you have made but does not exit the system setup program System Setup Program 15 A 16 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Index A adapter card 1 6 4 18 B back panel features 1 6 battery location 1 13 removal 4 21 beep codes about 3 1 list of 3 2 bezel removal 4 3 boot routine observing when troubleshooting 2 3 card guide assembly removal 4 15 computer back panel features 1 6 features list 1 2 front panel features 1 4 1 5 internal features 1 4 orientation 1 3 specifications 1 18 connectors back panel 1 6 system board 1 13 control pane
8. Diskette communications ports frequency 24 MHz derived from system clock Memory SIMM four SIMM capacities 16 and 32 MB Minimum RAM 32 Maximum RAM 128 MB EDO Secondary cache 512 KB pipelined write back SRAM on SEC cartridge Memory access time RAC kako eed adn HAS 60 ns CAC Cose eek 15 ns BIOS address F0000h Drive Bays Externally accessible Desktop chassis four total two bays for 5 25 inch diskette drives tape drives or CD ROM drives one bay for a 3 5 inch diskette drive or tape drive and one bay for a 3 5 inch diskette drive Mini tower chassis five total two bays for 5 25 inch diskette drives tape drives or CD ROM drives two bays for 3 5 inch diskette drives or tape drives and one bay for a 3 5 inch diskette drive Internally accessible both chassis two bays for 1 inch high EIDE or SCSI hard disk drives System Overview 1 19 Table 1 5 Technical Specifications continued Ports Externally accessible Serial 9 pin connector Parallel bidirectional 25 hole connector PS 2 style keyboard 6 pin mini DIN connector PS 2 compatible mouse 6 pin mini DIN connector USB two USB compliant connectors MIDI game 15 pin connector three miniatur
9. Primary Hard Disk Drive Removal To remove the primary hard disk drive follow these steps 1 Remove the front bezel 2 Remove the two mounting screws 3 4 Disconnect power and interface cables from the back of primary Lift the primary hard disk drive out of the card guide assembly hard disk drive When you reinstall the primary hard disk drive be sure the circuit board is toward the front of the chassis When you replace a hard disk drive be sure to set the jumpers on the replace ment drive the same as the jumpers on the drive you removed For additional information about jumper settings on EIDE drives see EIDE Subsystem in Chapter 1 4 10 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Secondary Hard Disk Drive secondary hard disk drive assembly drive assembly mounting screws 2 Figure 4 11 Secondary Hard Disk Drive Assembly Removal To remove the secondary hard disk drive follow these steps 1 Remove the front bezel 2 Disconnect the power and interface cables from the back of the second ary hard disk drive 3 Remove the two drive assembly mounting screws 4 Slide the secondary hard disk drive assembly toward the back of the chassis and lift it out Removing and Replacing Parts 4 11 5 remove secondary hard disk drive from the drive bracket remove the screw from the side of the hard disk drive and then pivot the bracket away fro
10. 66 MHz A single edge contact SEC cartridge connected to the system board contains the system s microprocessor and cache circuitry Main memory consists of two or four EDO SIMMs arranged in pairs The base configuration for main memory is two 16 MB nonparity SIMMs Main memory can be expanded up to 128 MB using 16 or 32 MB SIMMs The front of the computer has two 5 25 inch drive bays one desktop system or two mini tower system 3 5 inch drive bay s plus a 3 5 inch diskette drive bay The 5 25 inch and 3 5 inch drive bays can hold diskette drives tape drives or CD ROM drives System Overview 1 1 System Features In addition to the standard features found in a traditional PC the Dell Dimension XPS H233 and XPS H266 systems include the following new and or advanced features An Intel Pentium II microprocessor with MMX technology specifically designed to handle complex multimedia and communications software Secondary cache of 512 KB of SRAM included within the SEC cartridge Main memory consisting of 32 to 128 MB of high speed EDO SIMMs Error correction code ECC support built into the system board that corrects single bit errors and detects all multiple bit errors when parity SIMMs are installed Three 32 bit PCI expansion card slots and two 16 bit ISA expansion card slots One shared expansion card slot can accept either a PCI or an ISA expansion card Support for SCSI hard disk drives and CD ROM
11. Cautions and Notes Throughout this manual there may be blocks of text printed in bold type or in italic type These blocks are warnings cautions and notes and they are used as follows WARNING A WARNING indicates the potential for bodily harm and pro vides instructions for how to avoid the problem CAUTION A CAUTION indicates either potential damage to hardware or loss of data and provides instructions for how to avoid the problem NOTE A NOTE provides helpful information about using the computer system System Overview The Dell Dimension XPS H233 and XPS H266 Systems are high speed single processor computer systems that use an Intel Pentium II micro processor with MMX technology These Dell systems incorporate an ISA expansion bus as well as a high performance PCI local bus These buses are built into the system board which also integrates all other elements of the basic computer system The Dell Dimension XPS H233 and XPS H266 systems are available in either a desktop or a mini tower configuration Both configurations use the same system board and base chassis The only difference other than physical mounting is the number of externally accessible 3 5 inch drive bays The Dell Dimension XPS H233 system operates at an internal frequency of 233 MHz and an external frequency of 66 MHz The Dell Dimension XPS H266 system operates at an internal frequency of 266 MHz and an external fre quency of
12. Configures individual EIDE drives For most EIDE drives you should select the Auto Con figured option unless you are using a hard disk drive that does not support the autodetect fea ture In this case select User Definable and enter the appropriate values in the Cylinders Heads Sectors and Maximum Capacity fields For a non IDE drive set this category to Disabled Fast Programmed I O Enables or disables the use of programmed I O Modes which can improve the performance of a hard disk drive If you select Auto Detected the default the system BIOS uses the fastest pro grammed protocol supported If you select Disabled programmed is turned off A 4 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Boot Options Submenu First Boot Device Second Boot Device Third Boot Device Fourth Boot Device System Cache Systen Speed Lock Floppy Access Setup Prompt Hard Disk Pre Delay Boot Options Press Enter Typemnatic Rate Programming Dell Dimension XPS H233 Setup EO SY Item Specific Help Floppy Hard Disk Disabled Disabled Enabled Fast Off Read Urite Enabled Disabled Default Fl Help ESC Back Tl Select Item Select Menu Change Values Setup Defaults Enter Select Submenu 10 Previous Values Figure A 3 Boot Options Submenu Table A 3 Boot Options Submenu Categories Category Function Fi
13. Submenu 10 Previous Values Figure A 5 Peripheral Configuration Submenu Table A 5 Peripheral Configuration Submenu Categories Category Function Primary PCI Interface Configures the primary EIDE interface on the system board Options for this category are Auto Configured the default and Disabled Secondary PCI IDE Configures the secondary EIDE interface on Interface the system board Options for this category are Auto Configured the default and Disabled Floppy Interface Configures the diskette tape drive interface on the system board Options for this category are Auto Configured the default Enabled which locks the interface at I O port address 3FOh 3F5h and Disabled Serial Port 1 Interface Configures the built in serial port on the sys tem board You can set this category to Auto Configured the default or to Disabled or you can select a specific port designation I O address and IRQ line for the port The avail able port designations are COM1 COM2 and 4 available I O addresses 3F8h 3E8h 2F8h and 2E8h and available interrupts are IRQ3 and IRQ4 A 8 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Table 5 Peripheral Configuration Submenu Categories continued Category Function Parallel Port Interface Configures the built in parallel port on the system board Set this category to Auto Con figured the default or to Disab
14. card IRQIO Available for use by an expansion card IRQI1 gt Default PCI IRQ assignment IRQ12 Generated by I O controller to indicate full mouse output buffer IRQ13 Generated by math coprocessor to indicate a coprocessor error IRQ14 Generated by a device connected to the primary EIDE interface to indicate that the device requires service IRQ15 Generated by a device connected to the secondary EIDE interface to indicate that the device requires service If no device is con nected to the secondary EIDE interface IRQ15 is available for use by an expansion card The PCI IRQ line is assigned to an available IRQ line after all ISA expansion cards have been configured If an ISA expansion card is configured for the PCI IRQ is as signed to another available IRQ line 1 16 Dell Dimension XPS H233 and XPS H266 Systems Service Manual DMA Channel Assignments Table 1 4 DMA Channel Assignments DREQ Line Used By Available DREQO Default audio DMA channel assignment DREQI Default audio DMA channel assignment DREQ2 Generated by I O controller to enable DMA cycle for attached diskette drive DREQ3 Available for use by an expansion card DREQ4 Reserved selects second DMA controller DREQ5 Available for use by an expansion card DREQ6 Available for use by an expansion card DREQ7 Available for use by an expansion card System Overview 1 17 Technical Specifications
15. drives when a SCSI controller card is installed in an expansion card slot A high speed high resolution PCI video controller card installed in an expansion card slot rather than an integrated video controller to provide video flexibility for customers A 16 bit integrated audio controller that provides sound functions com patible with a Sound Blaster Pro expansion card A MIDI game port for connecting a MIDI device joystick game pad or other game input device An integrated high performance serial port and a bidirectional parallel port Two USB connectors which can simplify connecting peripheral devices Most of these features are briefly described in this chapter For a complete list of system features see Technical Specifications found later in this chapter When following the procedures in this manual assume that the locations or directions relative to the computer are as shown in Figure 1 1 NOTE Some service procedures recommend laying the mini tower computer on its right side to improve service access but the descriptions in this manual con tinue to use the directions shown in Figure 1 1 for the mini tower computer 1 2 Dell Dimension XPS H233 and XPS H266 Systems Service Manual left side right side left side right front front Mini Tower Computer Desktop Computer Figure 1 1 Computer Orientation CAUTION To avoid possible data or file structure corruptions the re
16. port is enabled or disabled displays configuration settings if enabled System Setup Program A 9 Chipset Configuration Submenu Dell Dimension XPS H233 Setup Chipset Configuration Press Enter Item Specific Help Base Memory Latency Timer PCI Clocks Bank 0 Bank 1 640 KB Auto Configured EDO Not Installed 1 Help 11 Select Item ESC Back Select Menu Change Values F9 Setup Defaults Enter Select Submenu 10 Previous Values Figure A 6 Chipset Configuration Submenu Table A 6 Chipset Configuration Submenu Categories Category Function Base Memory Displays the maximum amount of memory available to MS DOS programs that do not use expanded or extended memory Options for this category are 640 KB the default and 512 KB Latency Timer PCI Clocks Specifies how quickly a PCI card is guaranteed to have access to the PCI bus The value for this category can be set to Auto Configured the default or to a specific PCI clock cycle value in increments of eight from 16 to 128 Bank 0 Indicates the type of SIMMs installed in the first pair of SIMM sockets J6J1 and J6J2 Bank 1 Indicates the type of SIMMs installed in the second pair of SIMM sockets J7J1 and J7J2 if any A 10 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Plug and Play Configuration Submenu Dell Dimension XPS H233 Setup Plug and Play Configuration F
17. 1 Disconnect the microprocessor fan cable from J8L1 connector the system board see Figure 4 17 2 At the back of the chassis press the two release buttons and lift the microprocessor fan assembly out of the chassis Maintain upward pressure on the fan assembly while you press the two release buttons 4 14 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Guide Assembly card guide assembly mounting tabs 4 Figure 4 15 Card Guide Assembly Removal To remove the card guide assembly follow these steps 1 ae eM Disconnect any cables connected to full length expansion cards and remove these expansion cards Note the location of each connector and the orientation of any cables attached to the expansion cards before disconnecting these cables Remove the 3 5 inch diskette drive Remove the primary hard disk drive If a secondary hard disk drive assembly is present remove it Disconnect the control panel cable from connector J9D1 on the system board see Figure 4 17 Press the four mounting tabs that secure the card guide assembly to the front panel and press on the tab at the back of the card guide assembly Lift the card guide assembly including the control panel cable out of the chassis Removing and Replacing Parts 4 15 Control Panel Board D B o control panel board mounting tab Figure 4 16 Control Panel Board Removal To remove the cont
18. 32 MB SIMMs The SIMMs within each pair 1671 and J6J2 or J7J1 and J7J2 must be the same capacity and parity type but the two pairs need not match each other The system s ECC support which is built into the system board corrects single bit errors and detects all multiple bit errors To use the ECC support all installed SIMMs must be parity SIMMs System Overview 1 13 System Board Jumpers See Figure 1 11 and Table 1 2 for jumper settings and descriptions il A 1 ee E E 2 Figure 1 11 System Board Jumpers 1 14 Dell Dimension XPS H233 and XPS H266 Systems Service Manual D ejoo ejoo Rel Table 1 2 System Board Jumper Descriptions Jumper Settings Description A pins 1 3 B pins 1 6 C pins 1 3 microprocessor speed 4 6 4 6 4 6 The microprocessor s internal speed is 233 MHz 13 13 13 4 6 4 6 4 6 The mi din di Be microprocessor s internal speed is omg der 09 266 MHz 1 3 1 3 1 3 A pins 4 6 reserved 4 6 oE DA 1 3 Reserved do not change C pins 4 6 clear CMOS oo System setup settings are retained when the system boots default setting 1 3 3 06 System setup settings revert to their defaults C when the system boots Set to pins 4 5 and boot
19. 5 VDC white common black common black common black PSON brown 4 11 12 13 14 15 16 17 18 19 20 0000000000 1 112 5 VDC red common black 5 VDC red common black 3 4 5 6 7 8 9 10 PWRGOOD gray 5 VDC red 5 VDC red 5 VDC red not connected 5 VDC red common black common black 12 VDC blue 12 VDC yellow 5 VFP purple 1 Pin 5 PWRGOOD is a status signal generated by the power supply to notify the system that the DC operating voltages are within the ranges required for proper system operation Pin 11 PSON is activated by pressing and releasing the power button while the power supply is in its standby state This action connects the power supply s PSON input to ground thereby switching the power supply to its full on condition Figure 1 7 DC Power Connector P1 System Overview 1 11 2 ES ELA Pa BERE 1 2 3 4 i 3 4 5 VDC red 45 VDC red common black common black common black common black 12 VDC yellow 12 VDC yellow Figure 1 8 DC Power Connectors P2 P3 P4 P5 and P6 ez nnannn 1 2 3 4 5 6 common black MEN 3 3 VDC orange common black 3 3 VDC orange common black 3 3 VDC orange Figure 1 9 DC Power Connector P7 1 12 Dell Dimension XP
20. C cartridge Slide the retainer bar back into position on the heat sink support C3 battery Battery battery socket Figure 4 22 Battery Removal WARNING There is a danger of the new battery exploding if it is incorrectly installed Replace the battery only with the same or equiva lent type recommended by the manufacturer Discard used batteries according to the manufacturer s instructions The battery is a 3 0 V CR2032 coin cell battery To remove the battery follow these steps 1 If possible enter the system setup program see Appendix A System Setup Program for instructions and print the system setup screens 2 Remove the computer cover 3 Remove the battery by prying it out of its socket with your fingers or a blunt nonconductive object such as a plastic screwdriver To replace the battery install the new battery with the side facing up Then start the system setup program and reset the System Date and System Time categories Compare the system configuration settings with the copy made in step 1 Restore any system configuration information that was lost while replac ing the battery Removing and Replacing Parts 4 21 System Board 3 5 inch diskette drive secondary hard disk drive bracket system board Figure 4 23 System Board Removal 1 Disconnect any cables attached to the I O panel on the back of the computer 2 Remove any installed expansion c
21. Categories continued Category Function Secondary IDE Slave Identifies the second drive attached to the sec ondary EIDE interface usually a CD ROM or tape drive See the Device Configuration Sub menu subsection in this appendix Boot Options Displays a submenu See the Boot Options Submenu subsection in this appendix Video Mode Displays the video mode detected by the system Base Memory Displays the maximum amount of memory available to MS DOS programs that do not use expanded or extended memory To change the amount of base memory see the Chipset Configuration Submenu subsection in this appendix Extended Memory Displays the amount of system memory available as extended memory Service Tag Displays system s service tag number BIOS Version Displays the version of the BIOS being used System Setup Program A 3 IDE Device Configuration Submenu Dell Dimension XPS H233 Setup Eo Primary IDE Master 5 32140 Item Specific Help IDE Device Configuration Auto Configured Cylinders 4095 Heads 16 Sectors 63 Maximum Capacity 2016 MB Fast Programmed 1 0 Modes Auto Detected F1 Help 1 Select Item Change Values F9 Setup Defaults ESC Back Select Menu Enter Select Submenu 10 Previous Values Figure A 2 IDE Device Configuration Submenu Table A 2 IDE Device Configuration Submenu Categories Category Function IDE Device Configuration
22. Defective system board Incorrect disk settings in the system setup program Defective system board Defective system board Beep Codes and Error Messages 3 5 3 6 Table 3 2 System Error Messages continued Message Definition Probable Causes Invalid Boot Diskette KB Interface Error Keyboard Error Keyboard is Locked Unlock It Uncorrectable System cannot boot from diskette in drive A Error detected at key board connector Keyboard has timing problem System cannot communicate with keyboard ECC detected a multiple bit error it could not correct Diskette in drive A contains no operating system Diskette in drive A is faulty Drive A interface or power cable faulty or improperly connected Drive A defective Keyboard improperly connected or faulty Keyboard improperly connected or faulty Keyboard improperly connected or faulty A SIMM is faulty Dell Dimension XPS H233 and XPS H266 Systems Service Manual This chapter provides procedures for removing and replacing components assemblies and subassemblies of the computer Unless otherwise noted each procedure assumes the following The computer cover has already been removed A part can be replaced by performing the removal procedure in reverse order The procedures in this chapter apply to both desktop and mini tower configurations Precautio
23. Dell Dimension XPS H233 and XPS 266 Systems SERVICE MANUAL Vl o e ium c Dell Dimension XPS 233 and XPS 266 Systems Information in this manual is subject to change without notice 1997 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 Dimension are registered trademarks of Dell Computer Corporation Intel and Pentium are registered trademarks and MMX is a trademark of Intel Corporation Microsoft MS DOS Windows and Windows are registered trademarks of Microsoft Corporation IBM is a registered trademark of International Business Machines Corporation VESA is a registered trademark of Video Electronics Standards Association 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 May 1997 P N 84980 Contents Chapter 1 System 1 1 System Fealubes c recu ae IE MERC REN 1 2 Advanced Expansion Subsystem 1 6 EIDE Subsystems 1445s eec Li bia UA RES EAT 1 7 Hard Disk Drive Options
24. IMM sockets J6J1 J6J2 J7J1 and J7J2 Figure 4 17 System Board Components Removing and Replacing Parts 4 17 Expansion Cards retaining screw card mounting X bracket ISA expansion card card edge connector expansion card connector front of computer card guide assembly Figure 4 18 Expansion Card Removal To remove an expansion card follow these steps 1 Disconnect any cables from the expansion card Note the location of each connector and the orientation of any cables attached to the expansion card before disconnecting these cables Remove the retaining screw from the card mounting bracket Grasp the expansion card by its corners and carefully pull it out of its expansion card connector 4 18 Dell Dimension XPS H233 and XPS H266 Systems Service Manual SIMMs cutout RN back of computer Figure 4 19 SIMM Removal To remove a SIMM push outward on each of the SIMM socket s metal tabs see step 1 of Figure 4 19 and rotate the SIMM in the direction of the arrows see steps 2 and 3 of Figure 4 19 until it is released from its socket To replace a SIMM position it in its socket as shown in step 1 of Figure 4 20 While holding the SIMM s edge connector firmly against the SIMM socket rotate it in the direction of the arrows shown in step 2 of the figure until it snaps into place back of computer cutout connector 1 Figure 4 20 SIMM Replacement Re
25. S H233 and XPS H266 Systems Service Manual System Board The subsections that follow provide service related information about system board components mouse connector 3 3 V power MOUSE SEC cartridge power input connector input connector connector SLOT 1 POWER J7M1 keyboard connector ZEND eee KEYBRD battery socket BT9M1 9 nd LA microprocessor fan n connector J8L 1 c primary EIDE channel zm connector PRI IDE USB connectors USB connector SER1 gon serial port parallel port fet connector PARALLEL connector secondary EIDE channel connector SEC IDE integrated audio controller jacks LINE OUT LINE control panel IN and MIC IN connector J9D1 port SCSI hard disk drive GAME AUDIO access indicator cable connector J8D1 CD ROM drive audio cable connector CDROM system board PCI expansion card jumpers connectors 2 and wave table upgrade connectors J7C1 and J7D1 ISA expansion card connectors ISA1 ISA2 and ISA3 SIMM sockets J6J1 J6J2 J7J1 and J7J2 Figure 1 10 System Board Features Main Memory The four SIMM sockets can accommodate one or two pairs of EDO SIMMs The base configuration for main memory is one pair of 16 MB nonparity SIMMs installed in sockets J6J1 and J6J2 Main memory can be expanded using pairs of 16 or
26. System Board nsu 4 22 Appendix A System Setup Program A 1 System Setup Screens piv igs e ER Roble OREN AR 1 i e 2 Device Configuration 4 Boot Options Submenu A 5 Advanced 5 e voor GN UR EE HIER 7 Peripheral Configuration Submenu A 8 Chipset Configuration A 10 Plug and Play Configuration Submenu 11 ea 12 Power Sereen be peed ck eee RE ek A 13 igus a mex deed de d eet Rus ten seas A 15 Index Figures Figure 1 1 Figure 1 2 Figure 1 3 Figure 1 4 Figure 1 5 Figure 1 6 Figure 1 7 Figure 1 8 Figure 1 9 Figure 1 10 Figure 1 11 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9 Figure 4 10 Figure 4 11 Figure 4 12 Figure 4 13 Computer Orientation 1 3 Desktop Computer 1 4 Mini Tower Computer 5 1 5 Back Panel Features 1 6 DC Power Cables ely eria 1 9 DC Power Distribution coner odo ee es odas 1 10 DC Power Connector 1
27. allel port MIDI game port selection cable ring connector connector switch video connector Ee power microphone receptacle serial port connector mouse connector line in connector connector keyboard USB line out connector connectors 2 connector Figure 1 4 Back Panel Features Typical Advanced Expansion Subsystem This computer system offers an advanced expansion subsystem that can support a mixture of traditional ISA expansion cards called legacy expansion cards Plug and Play ISA expansion cards and PCI expansion cards Either the operat ing system or the ISA Configuration Utility ICU provides the means to configure the various types of expansion cards and to avoid resource conflicts that might arise NOTES The ICU is required only when the system runs a non Plug and Play operating system such as Microsoft Windows NT 4 0 and earlier and includes legacy ISA expansion cards With the Microsoft Windows 95 operat ing system the functions provided by the ICU are handled by the Device Manager which can be accessed by double clicking the System icon in the Control Panel Windows 95 documentation provides instructions on using the Device Manager to manage resources and resolve conflicts Because Dell ships only Plug and Play and PCI expansion cards on Dell Dimension systems that have a non Plug and Play operating system the ICU is not provided with systems This utility can be downloaded from Dell s
28. ards Note the location of each connector and the orientation of any cables attached to the expansion cards before disconnecting these cables 3 Remove the 3 5 inch diskette drive 4 If there is a secondary hard disk drive remove it 5 Disconnect all internal cables from the system board The cables attached to the PRI IDE SEC IDE and FLOPPY connectors see Figure 4 18 each have two latches securing them to the system board Press the latch on each end of the cable connector and pull to release the cable from the system board 6 Remove the screws that secure the system board to the chassis see Figure 4 24 7 Carefully lift the system board out from the plastic standoffs see Figure 4 24 and remove the board from the chassis 4 22 Dell Dimension XPS H233 and XPS H266 Systems Service Manual 10 plastic standoffs Figure 4 24 System Board Mountings Place the system board on a level surface Protect the surface with an antistatic bag or other protective material Remove the SEC cartridge and heat sink assembly as described in Cartridge and Heat Sink Assembly found earlier in this chapter The SEC cartridge and heat sink assembly is more accessible when the sys tem board has been removed from the chassis but it is necessary to stabilize the board due to the forces required to remove components Remove the guide bracket assembly fo
29. ble 3 1 Table 3 2 Table A 1 Table A 2 Table A 3 Table A 4 Table A 5 Table A 6 Table A 7 Microprocessor Fan Assembly Removal 4 14 Card Guide Assembly Removal 4 15 Control Panel Board Removal 4 16 System Board 4 17 Expansion Card 1 4 18 SIMM eesi 4 19 SIMM 4 19 SEC Cartridge and Heat Sink Removal 4 20 Battery Removal e owen S EX OR 4 21 System Board 1 4 22 System Board Mountings 4 23 Guide Bracket Assembly 4 24 Man Serete ber eae ewex et n A 2 IDE Device Configuration Submenu 4 Boot Options 5 A 5 Advanced Sereens esee evi x eee oe ee Si A 7 Peripheral Configuration 5 A 8 Chipset Configuration Submenu 10 Plug and Play Configuration Submenu 11 Sec rity x ot Saas Rea wy ees ln Deis A 12 Power Screen sioe skSECRo ee ee bs A 13 EXit Sereenesccetenae feas recie ae uoce A 15 DC Voltage 1 8 System Boa
30. codes that may be gener ated during POST All beep codes except beep code 8 indicate a fatal error that prevents the system from completing the boot routine until the indicated condi tion is corrected NOTE It is normal for the computer to emit a single beep during the boot routine If the boot routine completes successfully this single beep is not considered a beep code When the system emits a beep code record the code and then find it in Table 3 1 If Table 3 1 does not lead to the source of the problem run the appropriate tests in the diskette based diagnostics to assist in troubleshooting the problem Beep Codes and Error Messages 3 1 3 2 Table 3 1 POST Beep Codes Beep Code Error Probable Causes 1 2 10 11 1 2 1 3 Memory refresh failure Memory parity error Memory failure occurred in first 64 KB of main memory Timer failure Microprocessor error Gate A20 failure Microprocessor exception interrupt error Video memory read write ROM checksum value does not match value encoded in system BIOS NVRAM shutdown register read write error Cache memory error No video adapter detected No monitor detected Defective system board A SIMM is faulty Replace all of the SIMMs Defective system board A SIMM is faulty Replace all of the SIMMs A SIMM is faulty Replace all of the SIMMs Defective system board Defective microprocessor Defe
31. ct Submenu F10 Previous Values Figure A 4 Advanced Screen Table A 4 A dvanced Screen Categories Category Function Processor Type Displays type of microprocessor installed Processor Speed Displays internal speed of the microprocessor Cache Size Indicates the amount of secondary cache mem ory installed Peripheral Configuration Displays a submenu See the Peripheral Configuration Submenu subsection in this appendix Chipset Configuration Displays a submenu See the Chipset Config uration Submenu subsection in this appendix Plug and Play Displays a submenu See the Plug and Play Configuration Configuration Submenu subsection in this appendix System Setup Program A 7 Peripheral Configuration Submenu Dell Dimension XPS H233 Setup Peripheral Configuration Press Enter Item Specific Help Primary PCI IDE Interface Auto Configured Secondary PCI IDE Interface Auto Configured Floppy Interface Auto Configured Serial Port 1 Interface Auto Configured Parallel Port Interface Auto Configured Parallel Port Type Bi directional USB Interface Enabled Audio Interface Enabled Primary PCI IDE Status Enabled Secondary PCI IDE Status Enabled Floppy Status Enabled Serial Port 1 Status COM1 3F8 IRQ4 Parallel Port Status 1 378 IRQ F1 Help Tl Select Item Change Values F9 Setup Defaults ESC Back Select Menu Enter Select
32. ctive system board Defective microprocessor System s video adapter is missing or faulty Corrupted system BIOS program Defective system BIOS chip Defective system board Defective microprocessor Defective or missing video adapter Defective or missing monitor Dell Dimension XPS H233 and XPS H266 Systems Service Manual System Error Messages Some system error messages indicate a fatal error in which case the system cannot usually be rebooted until an appropriate hardware change has been made The following messages indicate a fatal error 8042 Gate DMA Error DMA 1 Error 2 Error DD Control ler Fail 20 Error ure D D DMA DD Control ler Fail ure INTR 1 Error INTR 2 Error Table 3 2 System Error Messages Message Definition Probable Causes 8042 Gate Gate A20 of keyboard Defective system A20 Error controller is faulty board Address Line Short C Drive Error C Drive Failure Cache Memory Bad Do Not Enable Cache CH 2 Timer Error Address decoding not properly executed on system board No response from drive C Drive C failed Cache memory sub system not functioning properly Error occurred in sys tem timer 2 Defective system board Incorrectdrivesettings in system setup program Drive C needs reformatting Drive interface or power cable not prop erly c
33. de of the front panel insert 3 Rotate the right side of the front panel insert outward to disengage the retaining hook on the left side of the insert from the chassis Dell Dimension XPS H233 and XPS H266 Systems Service Manual drive drive slots Figure 4 5 Drive Cage Removal NOTE The drive cage is the same in both the desktop and mini tower comput ers The drive cage in the mini tower computer is mounted 90 degrees clockwise from the one shown in Figure 4 5 This rotation positions the drives horizontally when the computer is set up Whenever you need to remove or install a drive in the drive cage first remove the drive cage from the chassis as follows 1 Remove the front bezel 2 Note the location and orientation of all cables attached to drives installed in the drive cage Then disconnect the cables 3 Remove the screw that secures the drive cage to the chassis 4 Slide the drive cage forward approximately one half inch Then lift it up and away from the chassis The side of the chassis contains a detent that secures the drive cage to the side of the chassis The drive cage may be slightly difficult to slide forward until it detaches from this detent Removing and Replacing Parts 4 5 5 25 Inch Drive drive mounting screws 3 Figure 4 6 5 25 Inch Drive Removal To remove a drive from a 5 25 inch drive bay follow these steps 1 Remove the front beze
34. dures in the order they are presented in this chapter Initial User Contact When you first contact a user who has a problem ask the user to describe the problem and the conditions under which it occurs A verbal description can often indicate the cause of a problem or indicate the appropriate troubleshooting procedure to use After the user describes the problem follow these steps 1 Ask the user to back up any data on the hard disk drive if the system s condition permits See Maintaining the System in the online System User 5 Guide for informa tion about backing up data 2 Asktheuser to try to duplicate the problem by repeating the operations he or she was performing at the time the problem occurred Can the user duplicate the problem Yes Proceed to step 3 No Proceed to the next section External Visual Inspection 3 Observe the user to determine if he or she is making an error such as typing an incorrect key combination or entering a command incorrectly Is the problem a result of user error Yes Instruct the user in the proper procedure or direct him or her to the appropriate user documentation for the correct procedure No Proceed to the next section External Visual Inspection Basic Troubleshooting 2 1 External Visual Inspection The external visual inspection consists of a quick inspection of the exterior of the computer the monitor the keyboard any peripherals and cables While per f
35. e jacks for line in line out and microphone 15 hole connector video card Internally accessible Primary EIDE 40 pin connector Secondary EIDE 40 pin connector Diskette 34 pin connector Wave table upgrade S two 6 connectors CD ROM drive audio cable connector 4 pin connector Video Video PCI video card in an expansion card slot see manufacturer s specifications Controls and Indicators Reset control push button Power control push button Power indicator green LED Hard disk drive access green LED 1 20 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Table 1 5 Technical Specifications continued Power DC power supply 200 W Input voltage 90 to 135 VAC at 60 Hz or 180 to 265 VAC at 50 Hz Heat dissipation 778 BTUs fully loaded system without monitor System battery 3 V CR2032 coin cell Physical Specifications Desktop chassis eh ids 16 00 cm 6 3 inches Widths 42 42 cm 16 7 inches Depths 2 2508 bes 44 45 cm 17 5 inches Weight 2i sen Be 11 3 to 13 6 kg 25 to 30 Ib Mini tower chassis Height die nade 43 69 cm 17 2 inches 20 32 8 inches Deptt
36. emoving and Replacing Parts 4 7 4 8 Lower 3 5 Inch Drive Mini Tower Computer Only A demon 707 screws 3 1 Figure 4 8 Lower 3 5 Inch Drive Removal Mini Tower Computer Only The lower 3 5 inch drive attaches to the left side and bottom of the drive cage To remove a drive from the lower 3 5 inch drive bay follow these steps 1 Remove the front bezel 2 Remove the drive cage and drives as an assembly 3 Remove the three drive mounting screws from the left side and bottom of the drive cage and slide the drive out of the drive cage When you replace a drive be sure to set the jumpers on the replacement drive the same as the jumpers on the drive you removed For additional information about jumper settings on EIDE drives see EIDE Subsystem in Chapter 1 Dell Dimension XPS H233 and XPS H266 Systems Service Manual 3 5 Inch Diskette Drive drive release tabs Figure 4 9 3 5 Inch Diskette Drive Removal To remove the 3 5 inch diskette drive follow these steps 1 Remove the front bezel 2 Disconnect the power and interface cables from the back of the 3 5 inch diskette drive 3 Press the two drive release tabs and slide the drive out of the bay Transfer the drive release tabs to the replacement diskette drive before install ing the new drive Removing and Replacing Parts 4 9 Primary Hard Disk Drive primary hard disk drive card guide assembly mounting screws 2 Figure 4 10
37. eo Power Down selects the amount of monitor power saved when Advanced Power Management is enabled and the system has entered a time out period Options for this category and the amount of power saved are e Standby 20 power saved the default Suspend 90 power saved Sleep 95 power saved The higher the percentage of monitor power saved the longer the monitor takes to return to full power when the time out period ends Inactivity Timer Determines the period of system inactivity before certain system components enter a low power mode To disable power management set this field to 0 Hot Key Allows the user to define a key combination that causes the system to immediately enter a low power mode until the next time the key board or mouse is used The user defines a key to use in combination with Ctrl and Alt as the power key combination Auto Start On AC Loss When set to Enabled Auto Start On AC Loss allows the system to automatically restart if there is a momentary loss of AC power If this category is set to Disabled you must restart the system manually after a loss of AC power A 14 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Exit Screen Dell Dimension XPS H233 Setup Hain Advanced Security Exit Saving Changes Exit Discarding Changes Load Setup Defaults Discard Changes Save Changes Item Specific Help Press Enter Press Enter Press Enter Press Enter
38. front of the chassis Place both hands palms down near the back corners of the cover Using your index fingers push inward on the two cover release latches to release the cover Slide the cover approximately one inch toward the back of the com puter Then lift the cover off the computer 4 2 Dell Dimension XPS H233 and XPS H266 Systems Service Manual front bezel N tabs 3 5 D WAAAY Figure 4 2 Front Bezel Removal Mini Tower Chassis tabs 3 1 front bezel Figure 4 3 Front Bezel Removal Desktop Chassis To remove the front bezel follow these steps 1 Press the three tabs along the edge of the front bezel 2 Rotate the front bezel away from the chassis and disengage the retain ing hooks Removing and Replacing Parts 4 3 4 4 Dri ves The following subsections explain how to remove the front panel inserts drive cage and the various types of drives in the drive bays For additional informa tion about drive installation and configuration see Installing Drives in the online System User s Guide Front Panel Insert tabs 2 front panel retaining hook insert Figure 4 4 Front Panel Insert Removal The front panel inserts are attached to the drive cage Any empty bay should have a front panel insert installed To remove a front panel insert follow these steps 1 Remove the front bezel 2 Press the two tabs on the right si
39. ion Getting Help If none of the troubleshooting procedures in this chapter or the tests in the diag nostics reveal the source of the problem or lead to the proper troubleshooting steps for determining the source of the problem call Dell for technical assis tance For instructions see Contacting Dell in the online System User s Guide or the chapter titled Getting Help in the Diagnostics and Troubleshooting Guide Dell Dimension XPS H233 and XPS H266 Systems Service Manual Beep Codes and Error Messages This chapter describes beep codes and system error messages that can occur during system start up or in the case of some failures during normal system operation In some cases the system may display error messages and emit beep codes simultaneously In other cases such as when a video problem occurs the system may emit a beep code even though it cannot display an error message If a faulty system does not emit beep codes or display system error messages to indicate a failure run the appropriate tests in the diskette based diagnostics to help you isolate the source of the problem For instructions on starting and using the diskette based diagnostics see Running the Diagnostics in Chapter 2 Post Beep Codes If the monitor cannot display error messages during the POST the computer may emit a series of beeps that identifies the problem or that can help identify a faulty component or assembly Table 3 1 lists the beep
40. k drive subsystem as appropriate Beep codes A beep code is a series of beeps that indicates an error condition If the computer emits a beep code refer to Table 3 1 NOTE The computer beeps once during the boot routine This single beep is normal and is not a beep code e System error messages These messages can indicate problems or provide status information If a system error message displays refer to Table 3 2 Observe the monitor screen for the Diagnostics Menu Does the Diagnostics Menu display Yes See Running the Diagnostics found later in this chapter No Proceed to step 6 Insert another copy of the Dell Diagnostics Diskette into the diskette drive and reboot the computer Does the Diagnostics Menu display Yes See Running the Diagnostics found later in this chapter No Remove the diagnostics diskette from the diskette drive then proceed to the next section Internal Visual Inspection Internal Visual Inspection CAUTION Before you proceed with the internal visual inspection described in this section ensure that the user has saved all open files and exited all open application programs if possible A simple visual inspection of a computer s interior hardware can often lead to the source of a problem such as a loose expansion card cable connector or mounting screw When you perform the visual inspection refer to System Fea tures in Chapter 1 to locate system comp
41. l 2 Remove the drive cage and drives as an assembly 3 Remove the three drive mounting screws and slide the drive out of the bay When you replace a drive be sure to set the jumpers on the replacement drive the same as the jumpers on the drive you removed For additional information about jumper settings on EIDE drives see EIDE Subsystem in Chapter 1 4 6 Dimension XPS H233 and XPS H266 Systems Service Manual Upper 3 5 Inch Drive drive assembly mounting screws 2 drive bracket mounting screws 2 X s 7 gt rive bracket ES Figure 4 7 Upper 3 5 Inch Drive Removal The upper 3 5 inch drive uses a drive bracket between the drive and the right side of the drive cage To remove a drive from the upper 3 5 inch drive bay follow these steps 1 2 3 Remove the front bezel Remove the drive cage and drives as an assembly Remove the two drive assembly mounting screws and slide the drive assembly out of the bay Remove the two drive bracket mounting screws and remove the drive bracket from the drive If you are working on a desktop chassis the small plastic filler panel remains in place on the front face of the drive bracket When you replace a drive be sure to set the jumpers on the replacement drive the same as the jumpers on the drive you removed For additional information about jumper settings on EIDE drives see EIDE Subsystem in Chapter 1 R
42. l board removal 4 16 cover removal 4 2 D DC power connector pin assignments 1 11 diagram 1 10 distribution 1 9 diagnostics 2 6 diskette drive removal 4 9 DMA channel assignments 1 17 drive cage location desktop 1 4 location mini tower 1 5 removal 4 5 drives 3 5 inch diskette removal 4 9 5 25 inch removal 4 6 lower 3 5 inch removal 4 8 primary hard disk removal 4 10 secondary hard disk removal 4 11 types of 1 7 upper 3 5 inch removal 4 7 Index 1 EIDE subsystem 1 7 error messages 3 3 expansion card configuration 1 6 removal 4 18 expansion card guide 4 15 expansion card slots 1 6 external visual inspection 2 2 F fan removal 4 14 features list 1 2 front bezel removal 4 3 front panel features 1 4 1 5 front panel insert removal 4 4 H hard disk drives 1 2 1 4 1 5 1 7 4 10 4 11 initial procedures 2 1 interrupt assignments 1 16 ISA expansion card slots 1 6 J jumpers 1 14 K key to enter system setup program A 1 main memory 1 13 microprocessor removal 4 20 microprocessor fan assembly removal 4 14 PCI expansion card slots 1 6 POST beep codes 3 2 power AC power receptacle 1 6 connector pin assignments 1 11 DC power diagram 1 10 DC power distribution 1 9 voltage selection switch 1 6 power supply about 1 8 location desktop 1 4 location mini tower 1 5 power supply removal 4 13 primar
43. led or select a specific port designation I O address and IRQ line for the port The available port designa tions are LPT 1 LPT2 LPT3 available I O addresses are 378h 278h and 3BCh and available interrupts are and IRQS Parallel Port Type Controls the mode used by the system s built in parallel port Options for this category are Compatible For a unidirectional device Bi directional For a bidirectional device ECP For an ECP device EPP For an EPP device not supported USB Interface Determines whether the USB connectors are Enabled the default or Disabled If this cate gory is set to Enabled the system dynamically allocates an IRQ for the USB connectors according to the PCI specification Audio Interface Determines whether the integrated audio con troller is Enabled the default or Disabled Set this category to Disabled to use a sound expansion card instead of the integrated audio controller Primary PCI IDE Status Indicates whether the primary EIDE interface is enabled or disabled Secondary PCI Status Indicates whether the secondary EIDE inter face is enabled or disabled Floppy Status Indicates whether the diskette tape drive inter face is enabled or disabled Serial Port 1 Status Indicates whether the serial port is enabled or disabled displays configuration settings if enabled Parallel Port Status Indicates whether the parallel
44. low these steps 1 2 Turn on or reboot the system When prompted press lt Del gt immediately If you wait too long and the operating system begins to load into memory let the system complete the load operation Then shut down the system and try again NOTE To ensure an orderly system shutdown consult the documentation that accompanied the operating system System Setup Screens The system setup program consists of a number of menus and submenus with configuration options and information The menu bar provides access to the fol lowing five screens Main screen Provides settings for the basic system configuration Advanced screen Provides detailed settings for some system features Security screen Provides indications and settings for system password and setup password Power screen Provides settings for system power management features Exit screen Provides selections for saving and loading the configurations and options In addition to these screens options identified by a right arrow see Figure A 1 for an example provide access to submenus System Setup Program A 1 Screen Dell Dimension XPS H233 Setup m Hain TIT Security Power Exit System Time System Date Diskette Diskette B Primary IDE Master Primary IDE Slave Secondary IDE Master Secondary IDE Slave Boot Options Video Mode Base Memory Extended Memory Service Tag BIOS Versi
45. m the drive screw a secondary hard disk drive drive bracket tabs Figure 4 12 Secondary Hard Disk Drive Removal When you replace a hard disk drive be sure to set the jumpers on the replace ment drive the same as the jumpers on the drive you removed For additional information about jumper settings on EIDE drives see EIDE Subsystem in Chapter 1 When you insert the replacement hard disk drive into the drive bracket be sure the two tabs on the bracket fit into the mounting holes on the side of the drive 4 12 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Supply power supply mounting screws 2 power supply Figure 4 13 Power Supply Removal To remove the power supply follow these steps 1 Disconnect the AC power cable at the power supply 2 Disconnect the DC power cables from the POWER and J7M1 connec tors on the system board see Figure 4 17 3 Disconnect the DC power cables from all the drives 4 Remove the two power supply mounting screws from the back of the chassis 5 Lift the power supply out of the chassis Removing and Replacing Parts 4 13 Microprocessor Fan Assembly microprocessor fan p Ow Z back of chassis N assembly release buttons Figure 4 14 Microprocessor Fan Assembly Removal To remove the microprocessor fan assembly follow these steps
46. moving and Replacing Parts 4 19 4 20 SEC Cartridge and Heat Sink Assembly SEC cartridge release latches 2 heat sink retainer bar slot SEC cartridge guide bracket assembly heat sink support retainer bar Figure 4 21 SEC Cartridge and Heat Sink Removal WARNING The SEC cartridge and heat sink can get extremely hot dur ing system operation Be sure the assembly has had sufficient time to cool before you touch it When handling the SEC cartridge and heat sink assembly take care to avoid sharp edges on the heat sink 2 Press the SEC cartridge release latches until they snap into position 3 Grasp the SEC cartridge firmly and pull straight up on the cartridge to 4 To install the replacement SEC cartridge and heat sink assembly first verify that the cartridge release latches are pulled out Then slide the SEC cartridge into the uide bracket assembly with the heat sink toward the front of the computer and g remove it from the guide bracket assembly Up to 15 pounds of force is required to disengage the SEC cartridge from the connector Pull out the cartridge release latches until they snap into place Dell Dimension XPS H233 and XPS H266 Systems Service Manual Slide the retainer bar toward the front of the computer to remove it being careful not to damage the SIMMs next to the heat sink support firmly seat assembly Up to 25 pounds of force is required to seat the SE
47. nary Measures Before performing any of the procedures in this chapter read the following warning WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT Before you start to work on the system perform the following steps in the sequence listed 1 Turn off the computer and any attached peripherals 2 Disconnect the computer and any attached peripherals from their power sources to reduce the potential for personal injury 3 Disconnect any telephone or telecommunications lines from the computer 4 Wear a wrist grounding strap and clip it to an unpainted metal sur face such as the security cable ring on the back of the chassis If a wrist grounding strap is not available touch an unpainted metal sur face on the back of the computer to discharge any static charge from your body Removing and Replacing Parts 4 1 Computer Cover cover mounting thumbscrew cover release latches 2 c chassis foot Figure 4 1 Computer Cover Hemoval To remove the computer cover from a desktop or mini tower system follow these steps 1 If you are working on mini tower system lay computer its right side with the chassis foot off the edge of the work surface to allow the computer to lay flat Loosen the cover mounting thumbscrew that secures the cover to the back of the computer NOTE The thumbscrew is captive and should be retained in the cover when loosened Face the
48. nector on the back of the monitor For proper connection of the video interface cable see the documentation for the monitor 6 Inspect all external monitor controls for any obvious damage or improper settings For proper settings of the monitor controls see the documentation for the monitor 7 Inspect the keyboard to ensure that no keys are sticking If one or more keys are sticking it may be necessary to replace the keyboard 2 2 Dell Dimension XPS H233 and XPS H266 Systems Service Manual 8 Inspect exterior of the computer including all controls indicators and user accessible data storage devices for any signs of physical damage Does the inspection reveal any problems Yes Refer to the appropriate procedure in Chapter 4 Removing and Replacing Parts No Proceed to the next section Observing the Boot Routine Observing the Boot Routine After you have performed an external visual inspection as described in the pre vious procedure you should boot the system and while the boot routine is running observe the system for any indications of problems NOTE Most of the steps in this procedure require observation of system func tions and indications some of which can occur simultaneously It may be necessary to reboot the system several times in order to complete all of these steps To observe problem indications during the boot routine follow these steps 1 Insert a copy of the Dell Diagnos
49. on 09 39 55 Item Specific Help 11 26 1996 1 44 1 25 Mb 3 Not Installed ST32140A Not Installed FX120T Not Installed Press Enter 640 31 66H1G 0 01 01 DTOJ A00 11 Select Item Select Menu 1 1 ESC Back Enter Change Values F9 Setup Defaults Select Submenu 10 Previous Values Figure A 1 Main Screen Table A 1 Main Screen Categories Category Function System Time Resets time on system s internal clock System Date Resets date on system s internal calendar Diskette A Identifies the boot diskette drive in your com puter The default is 1 44 1 25 Mb 37 Diskette B Identifies a second diskette drive in your computer Primary IDE Master Identifies the first drive attached to the primary EIDE interface usually the boot hard disk drive See the Device Configuration Sub menu subsection in this appendix Primary IDE Slave Identifies the second drive attached to the primary EIDE interface usually a second hard disk drive See the Device Configuration Submenu subsection in this appendix Secondary IDE Master Identifies the first drive attached to the second ary EIDE interface usually a CD ROM or tape drive See the Device Configuration Sub menu subsection in this appendix Dell Dimension XPS H233 and XPS H266 Systems Service Manual Table 1 Screen
50. onents To perform the internal visual inspection follow these steps 1 Turn off the system including any attached peripherals and disconnect all the AC power cables from their power sources Dell Dimension XPS H233 and XPS H266 Systems Service Manual 2 Remove computer cover NOTE For your safety and protection of the system observe the guidelines listed in Precautionary Measures in Chapter 4 3 Verify that the single edge contact SEC cartridge SIMMs and expan sion cards are fully seated in their sockets or connectors WARNING The SEC cartridge heat sink assembly can get extremely hot Be sure the assembly has had sufficient time to cool before you touch it WARNING While reseating the SEC cartridge heat sink assembly use a wrist grounding strap or maintain contact with a metal surface on the chassis To reseat the SEC cartridge heat sink assembly remove it from its connector and reinstall it as described in SEC Cartridge and Heat Sink Assembly in Chapter 4 To reseat a SIMM remove it from its socket and reinstall it as described in SIMMs in Chapter 4 To reseat an expansion card remove it from its connector and reinstall it as described in Expansion Cards in Chapter 4 4 Verify that all configuration jumpers are set correctly For information about these jumpers see Configuration Jumpers in Chapter 1 5 Check all cable connectors inside the compu
51. online services After all legacy expansion cards have been configured by the operating system or with the ICU the system automatically assigns any required memory space IRQ lines and DREQ lines to any installed Plug and Play and PCI expansion cards the next time the system is booted 1 6 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Chapter 2 Using Configuration Software in Reference Guide and Configuring Expansion Cards section in the online System User s Guide located in the Dell Accessories folder provide instructions for using the ICU to configure legacy ISA expansion cards The expansion card slots include three ISA expansion card connectors and four PCI expansion card connectors One PCI expansion card connector and one ISA expansion card connector share a single expansion card slot so maxi mum of six expansion cards can be installed EIDE Subsystem The EIDE subsystem includes two EIDE interfaces primary and secondary each of which can support up to two EIDE devices such as high capacity EIDE hard disk drives CD ROM drives and tape drives When two EIDE drives are connected to a single EIDE interface cable a master slave relationship must be defined between the two drives so that they will operate correctly while cabled together Assigning the master and slave designations usually involves resetting jumpers on the circuit card on the under side of each drive The master slave rela
52. onnected Defective drive inter face or power cable Defective drive C Defective microprocessor Defective system board Beep Codes and Error Messages 3 3 Table 3 2 System Error Messages continued Message Definition Probable Causes CMOS Battery State Low CMOS Checksum Failure CMOS Display Type Mismatch CMOS Memory Size Mismatch CMOS System Options Not Set CMOS Time and Date Not Set D Drive Error D Drive Failure System battery not maintaining contents of NVRAM NVRAM checksum value changed since NVRAM contents were saved Video types detected by system BIOS and saved in NVRAM do not match Amount of main mem ory installed on system board does not match amount reflected by NVRAM System option parame ters in NVRAM not set System configuration settings for time and date in system setup program appear to be incorrect No response from drive D Drive D failed System battery at or near depletion of its charge Battery charge may be low or BIOS may be corrupted Display type detected by system BIOS does not matchtype actually installed Amount of main mem ory detected by system BIOS does not match amount actually installed One or more configu ration settings in system setup program are corrupted or im properly set System Time and or Sys tem Date categories in system setup program need to be reset Inco
53. orming the visual inspection make any necessary corrections To perform the external visual inspection follow these steps 1 Turn off the computer the monitor and all peripherals 2 Verify that all power cables are properly connected to the computer the monitor and peripherals and their power sources 3 Verify that the keyboard and mouse interface cables are firmly attached to the proper connectors on the back of the computer For a PS 2 compatible mouse the keyboard and mouse interface cable con nectors are identical except for their labels Verify that the keyboard and mouse interface cable connectors are firmly attached to the proper connec tors on the back of the computer To identify the proper connectors see Figure 1 4 For a serial mouse the mouse interface cable must be firmly attached to the serial port connector and its captive screws must be secure enough to ensure a firm connection 4 Verify that any devices attached to the serial and parallel port connec tors are properly connected Each of the serial and parallel interface cable connectors must be firmly attached to an appropriate connector on the back of the computer as well as to the interface connector on the device The captive screws that secure these connectors at each end of the interface cable must be secure enough to ensure a firm connection 5 Verify that the video interface cable connector is firmly attached to the video connector and to the con
54. produces DC voltages only under its loaded condi tion The DC power cable connectors must be connected to their corresponding power input connectors on the system board or drives in order to measure these voltages Table 1 1 DC Voltage Ranges Maximum Voltage Range Output Current 3 3 VDC 3 14 to 3 47 VDC 14 00 5 VDC 4 90 to 5 25 VDC 22 00 5 VDC 4 50 to 5 50 VDC 0 300 A 12 VDC 11 40 to 12 60 VDC 6 00 12 VDC 10 80 to 13 20 VDC 0 300 A 5 VSB 4 75 to 5 25 VDC 0 010 A The combined load on the 3 3 VDC and 5 VDC outputs cannot exceed 140 W 2 operations Dell Dimension XPS H233 and XPS H266 Systems Service Manual The 12 VDC output line can withstand surges of up to 11 0 A to support disk start up The 5 VSB volts standby is sometimes called flea power DC Power Distribution Figures 1 5 through 1 9 provide the following information about DC power distribution Power supply cable identification Typical DC power connections for diskette tape CD ROM and hard disk drives Power distribution to sockets and connectors the system board Pin assignments of DC power connectors Figure 1 5 DC Power Cables System Overview 1 9
55. r the SEC cartridge NOTE The four nuts are captive and should be retained in the assembly when loosened Using a 2 Phillips screwdriver loosen each of the four nuts see Figure 4 25 securing the guide bracket assembly to the system board Remove the assembly from the four threaded posts Removing and Replacing Parts 4 23 guide bracket assembly captive nuts 4 threaded posts 4 key SEC cartridge connector SLOT 1 Figure 4 25 Guide Bracket Assembly Removal To install a replacement system board install the guide bracket assembly for the SEC cartridge The assembly is keyed for correct insertion see Figure 4 25 Then install the SEC cartridge and heat sink assembly Transfer the SIMMs to the new system board and set the configuration jumpers to match the old sys tem board When installing the new system board in the computer push the system board against the back of the chassis so that the system board makes firm contact with the I O gasket to prevent EMI leakage CAUTION Failure to install the system board exactly as described may result in EMI leakage that could interfere with other electronic devices 4 24 Dell Dimension XPS H233 and XPS H266 Systems Service Manual System Setup Program This appendix describes the system setup program which is used to change the system configuration information stored in CMOS and NVRAM on the sys tem board To enter the system setup program fol
56. rd Jumper Descriptions 1 15 Interrupt 1 1 16 Channel Assignments 1 17 Technical 1 18 POST Beep Codes e XR S OR ree 3 2 System Error 3 3 Main Screen A 2 IDE Device Configuration Submenu Categories A 4 Boot Options Submenu A 5 Advanced Screen A 7 Peripheral Configuration Submenu Categories A 8 Chipset Configuration Submenu Categories A 10 Plug and Play Configuration Submenu Categories 11 Table A 8 Security Screen Categories Table 9 Power Screen Table A 10 Exit Screen Categories Read This First A prerequisite for using this manual to service Dell computer systems is a basic knowledge of IBM compatible PCs and prior training in IBM compatible PC troubleshooting techniques In addition to information provided in this manual and the online System User s Guide that came with the system Dell provides the Diagnostics and Troubleshooting Guide for troubleshooting procedures and instructions on using the Dell diagnostics to test the computer system Warnings
57. ress Enter Item Specific Help Configuration Mode Use BIOS Setup Fl Help Tl Select Item ESC Back Select Henu Change Values F9 Setup Defaults Enter Select Submenu 10 Previous Values Figure A 7 Plug and Play Configuration Submenu Table A 7 Plug and Play Configuration Submenu Categories Category Function Configuration Mode Configuration Mode determines whether the sys tem configures Plug and Play devices through the system BIOS or through the operating system Options are Use BIOS Setup and Use PnP OS NOTE The Configuration Mode setting deter mines what other categories are displayed on the Plug and Play Configuration submenu If Configuration Mode is set to Use BIOS Setup the ISA Shared Memory Size and IRQ catego ries are available If Use PnP OS is selected the PnP OS category appears ISA Shared Memory Size ISA Shared Memory Size specifies the size of the shared memory range for ISA expansion cards Options are Disabled 16KB 32KB 48KB 64KB 80KB and 96KB IRQ The IRQ categories enable you to reserve unused IRQs for use by an ISA device PnP OS PnP OS determines which Plug and Play compatible operating system the computer system is configured to use Options are Windows 95 and Other PnP OS System Setup Program Security Screen Dell Dimension XPS H233 Setup Security System Password Setup Password Enter System Password Enter Se
58. rol panel board follow these steps 1 Remove the front bezel 2 Remove the card guide assembly 3 Press the mounting tab to release the control panel board from the card guide assembly and remove the control panel board 4 16 Dell Dimension XPS H233 and XPS H266 Systems Service Manual System Board Components Figure 4 17 shows the locations of components on the system board The sub sections that follow explain how to remove various system board components mouse connector i 3 3 V power MOUSE SEC cartridge power input connector input connector connector SLOT 1 aoo VOS WER J7M1 keyboard connector KEYBRD USB 5 serial port m d connector SER1 parallel port P d connector PARALLEL integrated audio controller jacks LINE OUT LINE battery socket BT9M1 microprocessor fan connector J8L 1 primary EIDE channel connector PRI IDE diskette drive interface connector FLOPPY secondary EIDE channel connector SEC IDE control panel IN and MIC IN connector J9D1 MIDI game port SCSI hard disk drive GAME AUDIO access indicator cable connector J8D1 CD ROM drive audio cable connector CDROM system board PCI expansion card jumpers connectors PCI1 2 and wave table upgrade connectors J7C1 and J7D1 ISA expansion card connectors ISA1 ISA2 and ISA3 S
59. rrect drive settings in system setup program Drive D needs reformatting Drive interface or power cable not prop erly connected Defective drive inter face or power cable Defective drive D Dell Dimension XPS H233 and XPS H266 Systems Service Manual Table 3 2 System Error Messages continued Message Definition Probable Causes Diskette Boot Failure DMA 1 Error DMA 2 Error DMA Bus Time out DMA Error FDD Controller Failure HDD Controller Failure INTR 1 Error INTR 2 Error System cannot boot from diskette in drive A Error condition occurred in DMA channel 1 Error condition occurred in DMA channel 2 Device has driven bus signal longer than allowable 7 8 microseconds Error condition occurred in DMA controller System BIOS cannot communicate with diskette tape drive controller System BIOS cannot communicate with EIDE hard disk drive interface or installed hard disk drive control ler card Failure detected in interrupt channel 1 during POST Failure detected in interrupt channel 2 during POST Diskette in drive A does not contain boot able operating system or bootable operating system is corrupt Defective system board Defective system board Defective system board Defective system board Defective system board Defective hard disk drive controller card 1f one is installed
60. rst Boot Device Determines which device the system tries to boot from first Options for this category are as follows Floppy Diskette drive Disk A hard disk drive connected to the primary EIDE channel CD ROM A CD ROM drive Network A drive on the network server Disabled First boot device not available Second Boot Device Determines which device the system tries to boot from if it cannot boot from the device selected for First Boot Device Options for this category are the same as for the First Boot Device Third Boot Device Determines which device the system tries to boot from if it cannot boot from the devices selected for First Boot Device and Second Boot Device Options for this category are the same as for the First Boot Device System Setup Program A 5 Table A 3 Boot Options Submenu Categories continued Category Function Fourth Boot Device Determines which device the system tries to boot from if it cannot boot from the devices selected for First Boot Device Second Boot Device and Third Boot Device Options for this category are the same as for the First Boot Device System Cache Enables or disables the secondary cache memory System Speed Specifies the processor speed at which your system boots and runs Options for this cate gory are Fast for the microprocessor s rated speed and Compatible which helps accommo date
61. set button should only be used when the system cannot be rebooted by press ing lt Ctrl gt lt Alt gt lt Del gt Before you use the reset button to initiate a hardware reset close any open application programs and files if possible CAUTION Ensure that all expansion card slots have either a card mounting bracket or a metal filler bracket installed Ensure that the unoccupied drive bays have a front panel insert installed Omitting these inserts or brackets can disturb the normal airflow in the computer resulting in possible damage to system components System Overview 1 3 1 4 microprocessor fan power supply system board secondary hard disk drive bracket expansion card slots drive cage drive bays typical 3 5 inch d diskette drive power button hard disk drive access indicator card guide assembly rset button and primary hard disk drive front bezel Figure 1 2 Desktop Computer Features Dell Dimension XPS H233 and XPS H266 Systems Service Manual microprocessor fan power supply secondary hard disk drive bracket we drive cage e gt lt drive bays f l a typical system board expansion card slots 3 5 inch diskette drive power button hard disk drive card guide assembly access indicator and primary hard disk drive reset button front bezel Figure 1 3 Mini Tower Computer Features System Overview 1 5 voltage security par
62. speed sensitive application programs by disabling all cache memory Num Lock Determines whether keyboard s Num Lock mode is activated at boot Floppy Access Determines whether your system can write data to a diskette inserted in a diskette drive Options are Read Write and Read Only Setup Prompt Enables the default or disables the prompt to enter the system setup program during the boot routine Hard Disk Pre Delay Enables or disables the default a delay before the BIOS accesses a hard disk drive to avoid accessing the drive before it has been initial ized Only older hard disk drives may need this delay Typematic Rate Programming Controls the amount of time a key must be pressed before the key repeat function starts and how many characters per second are output once the key repeat function has started A 6 J Dell Dimension XPS H233 and XPS H266 Systems Service Manual Advanced Screen Dell Dimension XPS H233 Setup Advanced Security Setup Warning Setting items on this menu to cause your system to malf Processor Type Processor Speed Cache Size b Peripheral Configuration Chipset Configuration Plug and Play Configuration Fl Help TL Select Item ESC Back Select Menu Power Exit Item Specific Help incorrect values unction Pentium R II chip 233 MHz 512K Press Enter Press Enter Press Enter Change Values F9 Setup Defaults Enter Sele
63. stem contains tests that aid in troubleshooting all major components of the computer system CAUTION To prevent damage to the original Dell Diagnostics Diskette always use a backup copy of the diagnostics diskette when servicing a user s system Dell recommends that users make several copies of this diskette to ensure that one is always available To start the diagnostics turn off the computer insert a copy of the Dell Diagnos tics Diskette into drive A and then turn on the computer Starting the diagnostics causes the Dell logo screen to display followed by a message indicating that the diagnostics is loading Before the diagnostics loads a program tests the portion of main memory RAM required for loading the diagnostics If a main memory error is detected a message appears on the screen telling you which SIMM has failed If no errors are found in main memory the diagnostics loads and the Diagnos tics Menu displays This menu lets you choose the following options or exit to the MS DOS prompt Run Quick Tests Runs selected tests from all test groups to quickly locate a failure or to indicate where further testing is needed to isolate a failure Run All Tests Runs all tests for a thorough check of the system Run Specific Tests Tests a particular area or subsystem See the chapter titled Running the Diskette Based Diagnostics in the Diagnos tics and Troubleshooting Guide for more informat
64. system to clear Reset to pins 5 6 to restore default CMOS settings at system start up D pins 1 3 password 4 6 E The system setup password features enabled default setting T 3 4 6 The password features are disabled Set to D pins 1 2 and then turn on the system to clear 1 3 the password s Reset to pins 2 3 to enable password features D pins 4 6 setup 4 6 oR D 13 Set to pins 5 6 to allow use of system setup program Set to pins 4 5 to prevent loading of the D system setup program I 3 System Overview 1 15 Interrupt Assignments Table 1 3 Interrupt Assignments IRQ Line Used By Available IRQO Generated by system timer IRQI Generated by I O controller to indicate full keyboard output buffer IRQ2 Generated internally by interrupt controller to enable IRQ8 through IRQ15 IRQ3 Available for use by an expansion card IRQ4 Generated by I O controller to indicate that the device connected to the serial port requires service COMI or COM3 IRQ5 Default audio IRQ assignment IRQ6 Generated by I O controller to indicate that the diskette drive or tape drive requires service IRQ7 Generated by I O controller to indicate that the device connected to the parallel port requires service IRQ8 Generated by I O controller for each tick of the RTC IRQ9 Available for use by an expansion
65. t AC Loss F1 Help ESC Back Figure A 9 Power Screen 11 Select Item Select Menu Enabled Item Specific Help Enabled Sleep 10 Enabled Setup Defaults F10 Previous Values Change Values F9 Enter Select Submenu Table A 9 Power Screen Categories Category Function Advanced Power Management Enables or disables all the other categories on the Power screen IDE Drive Power Down When set to Enabled the default IDE Drive Power Down allows most hard disk drives to automatically switch into low power mode after a specified period of system inactivity called a time out The time out period is set with the Inactivity Timer category When the IDE Drive Power Down category is set to Disabled hard disk drives do not switch into low power mode System Setup Program 13 Table 9 Power Screen Categories continued Category Function VESA Video Power Down NOTES For the Windows 95 operating system use the Display Properties dialog box in the Control Panel to save monitor power rather than using the VESA Video Power Down cate gory See the Windows 95 online help for instructions This category is available only if the installed video card supports this feature CAUTION Before enabling this feature check the monitor documentation to make sure the monitor is DPMS compliant other wise there is a risk of damaging the monitor VESA Vid
66. ter to verify that they are firmly attached to their appropriate connectors 6 Reinstall the computer cover 7 Reconnect the computer and any attached peripherals to their power sources and turn them on Does the problem appear to be resolved Yes No further steps are necessary No Proceed to the next section Eliminating Resource Conflicts Eliminating Resource Conflicts Devices within or connected to the computer may require dedicated memory spaces interrupt levels or DMA channels all of which must be allocated during installation of the devices Because devices may be installed at different times it is possible that the same resource is assigned to two or more devices Resource conflicts can result in disorderly or erratic system operation or failure of the system to operate at all If you suspect that resource conflicts might exist check the system using the Windows 95 Device Manager or the ISA Configura tion Utility ICU and reassign the resources as necessary See Advanced Basic Troubleshooting 2 5 2 6 Expansion Subsystem in Chapter 1 for information on the Device Manager the ICU See Interrupt Assignments in Chapter 1 to help identify possible conflicts Also review the documentation provided with any installed expansion cards and other devices for additional interrupt information for the specific devices unning the Diagnostics The diskette based diagnostics included with the sy
67. tics Diskette into drive A Turn on all peripherals and the computer If the computer is already on press the reset button or lt Ctrl gt lt Alt gt lt Del gt to reboot the system NOTE If the computer is already on save and close all open files and application programs if possible to avoid losing any data Then perform an orderly shutdown of the operating system see the operating system doc umentation for instructions before rebooting the system 2 Check the power supply fan Does the fan run normally Yes Proceed to step 3 No Troubleshoot the system power supply 3 Watch the Num Lock Caps Lock and Scroll Lock indicators on the upper right corner of the keyboard After all three indicators flash momentarily the Num Lock indicator should light up and remain on Do these indicators flash on and off within approximately 10 seconds after the boot routine starts Yes Proceed to step 4 No Troubleshoot the system power supply If the troubleshooting procedure indicates that the system power supply is operational troubleshoot the memory Basic Troubleshooting 2 3 2 4 4 While boot routine is running observe computer for any of following Diskette drive and hard disk drive access indicator activity These indicators light in response to data being transferred to or from the drives If either of these indicators fails to light during the boot rou tine troubleshoot the diskette drive or hard dis
68. tionship is defined in different ways for different types of drives For details about a specific drive refer to the docu mentation included with the drive When you replace a drive look at the jumpers on the removed drive to set the jumpers on the replacement drive NOTE The externally accessible drive bays at the front of the computer are normally used for diskette drives CD ROM drives or tape drives The hard disk drives should be installed in the internal drive bays as described in the following subsection For detailed information about the data storage sub system see Installing Drives in the online System User s Guide which is located in the Dell Accessories folder Hard Disk Drive Options A 1 inch high EIDE or SCSI hard disk drive is installed in the primary hard disk drive bay in the card guide assembly at the front of the chassis An optional inch high EIDE or SCSI hard disk drive can be installed in the secondary hard disk drive bay located near the 3 5 inch diskette drive SCSI hard disk drives require a SCSI controller card installed in an expansion card slot System Overview 1 7 1 8 Computer Service The following subsections provide service related information about the computer Power Supply The 200 W power supply can operate from an AC power source of 115 VAC at 60 Hz or 230 VAC at 50 Hz The power supply provides the DC operating volt ages and currents listed in Table 1 1 NOTE The power supply
69. tup Password Password Status Item Specific Help Installed Not Installed Press Enter Press Enter Unlocked 11 Select Item Select Menu F1 Help ESC Back Enter F9 Setup Defaults 10 Previous Values Change Values Select Submenu Figure A 8 Security Screen Table A 8 Security Screen Categories Category Function System Password Indicates whether a system password has been assigned Setup Password Indicates whether a setup password has been assigned Enter System Password Allows you to assign change or clear a system password NOTE The system password cannot be assigned changed or cleared if the Password Status category is set to Locked Enter Setup Password Allows you to assign change or clear a setup password The setup password can be used both to gain access to the computer system and to make changes in the system setup program Password Status NOTE Some computer systems do not display this category When Setup Password is set to Installed set ting Password Status to Locked prevents an assigned system password from being changed or cleared A 12 Dell Dimension XPS H233 and XPS H266 Systems Service Manual Dell Dimension XPS H233 Setup Hain Advanced Security Advanced Power Management IDE Drive Power Down VESA Video Power Down Inactivity Timer Minutes Hot Key CTRL ALT Auto Star
70. y hard disk drive removal 4 10 5 SCSI support 1 2 SEC cartridge 1 1 guide bracket assembly removal 4 24 removal 4 20 secondary hard disk drive removal 4 11 SIMMs 1 13 4 19 sockets Dell Dimension XPS H233 and XPS H266 Systems Service Manual battery 1 13 SIMMs 1 13 system battery removal 4 21 system board components 1 13 removal 4 22 system board jumpers location 1 14 settings 1 15 system error messages 3 3 system power supply removal 4 13 system setup program Advanced screen A 7 Boot Options submenu A 5 Chipset Configuration submenu A 10 entering 1 Exit screen A 15 IDE Device Configuration submenu A 4 Main screen A 2 menus A 1 system setup program continued Peripheral Configuration submenu A 8 Plug and Play Configuration submenu A 11 Power screen A 13 Security screen A 12 T technical specifications 1 18 troubleshooting boot routine 2 3 diskette based diagnostics 2 6 external visual inspection 2 2 getting help 2 6 initial procedures 2 1 resource conflicts 2 5 V visual inspection external 2 2 voltage selection switch location 1 6 Index 3 D LL Printed in the U S A P N 84980

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