Compaq Deskpro EX and Deskpro EXS Series of Personal
Contents
1. chapter 3 REMOVAL amp REPLACEMENT PRELIMINARIES 3 1 3 1 1 This chapter provides general service information for the computer Adherence to the procedures and precautions described in this chapter is essential for proper service CAUTION When the computer is plugged into an AC power source there is always voltage applied to the system board You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage Electrostatic Discharge Information A sudden discharge of static electricity from your finger or other conductor can destroy static sensitive devices or microcircuitry Often the spark is neither felt nor heard but damage occurs An electronic device exposed to electrostatic discharge ESD may not be affected at all and can work perfectly throughout a normal cycle The device may function normally for a while then degrade in the internal layers reducing its life expectancy Networks built into many integrated circuits provide some protection but in many cases the discharge contains enough power to alter device parameters or melt silicon junctions Generating Static The following table shows that W Different activities generate different amounts of static electricity W Static electricity increases as humidity decreases Relative Humidity Event 5596 40 10 Walking across carpet 7 900 V 15 000V 35 000 V Walking across vinyl floor 3 000 V 5 000 V2. eese 3 3 3 2 SROUUME eri TTL 3 3 3 2 1 General Cleaning Safety Precautions esee 3 3 3 222 Cleaning the Computer Case nie eee e e edes 3 4 3 2 3 Cleaning the Keyboard sese A nennen enne 3 4 324 Cleaning the Monitor Limia eee e teet den 3 4 3 25 Cleaning the Mouse sie Ree eee ee 3 5 Contents iii iv 3 3 Service Considerations eee dads ee et e IG 3 5 3 3 1 Power Supply Fan haee ir ietussoten idee 3 5 3 3 2 Tools and Software Requirements essere 3 5 EMEN CQ E e E 3 5 3 3 4 Cables and Connectors oce eee eere iones netos 3 6 3 35 Hard DAVES 5o e eR eterno peste ies d 3 6 3 3 6 Lithium Coin Cell Battery e e a rene eee 3 6 chapter 4 Removal and Replacement Procedures 4 1 Disassembly Sequence Chart cite cue gere tcn loe ite der eee 4 1 4 2 Disassembly Preparation cccccesccesccecssecesececsseceeececacceeeeecaeceeeeecsaeceeneecaeeeeeeecsaeeeenes 4 2 4 3 Feet Installation bete tit eet eie eed pe e i pee teda 4 3 44 Cable BOCK uS URDU ee ees ek 4 4 4 3 ACCESS Palito ao UN 4 5 4 6 Front Bezel ci A ed Ae ee A ae A a s 4 6 4T Power Buton stato eode e bite t ae e p eite 4 7 4 8 Subpanel and Bezel Blanks seen neen eene enne 4 8 4 9 Power Switch Assembly enit tr Bot eto eate te E 4 9 4 10 Mass Storage Devices montati enn r eene enne tenet ree trennen enne 4 10 4 10 1 Removing
3. Bytes per Sector 512 Sectors per Track high low density 18 9 Tracks per Side high low density 80 80 Read Write Heads 2 Cylinders high low density 80 80 Average Seek Time ms Track to Track high low 3 6 Average high low 94 173 Settling Seek Time 15 Latency Average ms 100 6 6 Specifications 6 2 2 Ultra ATA Hard Drives Formatted Capacity Physical MB Logical MB Compaq Spare Part Number Logical Block Allocation Total Sectors User Addressable Sectors Sectors per Track Physical Logical Data Heads Cylinder Physical Logical Data Bytes Sector Sector Interleave ECC Bytes Encoding Method Spin Up Time maximum Spin Down Time maximum Seek Times Logical Busy to Seek Complete Track to Track Average Read Full Stroke Average Latency Data Transfer Rate Disk to Buffer interface w o IORDY DMA UDMA RPM 10 0 GB 10242 10242 203139 001 16514064 19541088 648 396 63 2 16 512 1 1 24 24 26 EPRML 15 seconds 15 seconds MAX TYP 4 75ms 2 1ms 11 5ms 10 9ms 27 0ms 25 0ms 5 56ms 308 Mbits s max 16 6 MB s 16 6 MB s 66 6 MB s 5400 0 2 Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 6 7 15 0 GB 15364 15364 202903 001 16514064 29336832 648 396 63 3 16 512 1 1 24 24 26 EPRML 15 seconds 15 seconds MAX TYP 4 75ms 2 1ms 11 5ms 10 9ms 27 0ms 25 0ms 5 56ms 308 Mbits s max 16 6 MB s 16
4. ICH Fixed 1 0 Registers cont Port CF9h AOh Al A4h A5h A8h A8h ACh ADh BOh B1h B4h B5h B8h B9h BCh BDh B2h B3h COh C4h C8h CCh C1h C5h C9h CDh C2h C6h CAh CEh C3h C7h CBh CFh DOh Dih D4h D5h D6h D7h D8h D9h DAh DBh DCh DEh DEh DFh FOh 170h 177h Specifications Register Name Reset Control Register Slave PIC ICW1 Init Cmd Word 1 Register Slave PIC OCW2 Op Ctrl Word 2 Register Slave PIC OCW3 Op Ctrl Word 3 Register Slave PIC ICW2 Init Cmd Word 2 Register Slave PIC ICW3 Init Cmd Word 3 Register Slave PIC ICWA Init Cmd Word 4 Register Slave PIC OCW1 Op Ctrl Word 1 Register Aliased at AOh Ath Advanced Power Management Control Port Register Advanced Power Management Status Port Register Channel 4 5 6 7 DMA Base and Current Address Register Aliased at COh Aliased at C4h Aliased at C8h Aliased at CCh Channel 4 5 6 7 DMA Base and Current Count Register Aliased at C2h Aliased at C6h Aliased at CAh Aliased at Ceh Channel 4 7 DMA Command Register Channel 4 7 DMA Status Register Aliased at DOh Channel 4 7 DMA Write Single Mask Register Aliased at D4h Channel 4 7 DMA Channel Mode Register Aliased at D6h Channel 4 7 DMA Clear Byte Pointer Register Aliased at D8h Channel 4 7 DMA Master Clear Register Aliased at DAh Channel 4 7 DMA Clear Mask Register Aliased at DCh Channel 4 7 DMA Write All Mask Register Aliased at DEh Coprocessor Error Register PIO Mod
5. 5 Remove the screw at the top of the expansion slot Remove the AGP graphics board as you would any PCI expansion board Section 4 11 2 Removal amp Replacement Procedures 4 14 Processor 1 Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures 2 Remove the computer cover Section 4 3 3 Ifthere is a fansink on the processor unplug the fan cable from the system board 4 Remove the heatsink retaining clip O by pressing down on the clip s extended tab until it releases from the safety catch 5 Lift the heatsink off the processor 6 Release the processor from the socket by pulling the handle on the ZIF socket out and upward Q 7 Liftthe processor out of the socket WARNING Removing the heatsink from the processor destroys the integrity of the thermal interface pad between the two Whenever the heatsink is removed the thermal interface pad must to be removed and a new one installed in its place Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 29 Before installing a fansink prepare for its installation by doing one of the following New heatsink if the heatsink has a thermal interface attached to its bottom peel off the protective paper bef
6. Easy Access Keyboard US 123130 xxx D Dutch 331 Finnish 351 French 051 International B31 Norwegian 091 Spanish 071 Swedish 101 UK 031 US 001 Miscellaneous Screw Kit not illustrated Spare Part Warranty Description Number Tier Miscellaneous Screw Kit includes 179180 001 D 6 32 x 1 4 hi top thread forming screw with serrations 5 ea 192308 001 6 19 x 5 16 panhead plastite screw 4 ea 101346 068 6 19 x 5 16 hi top taptite screw with captive washer 4 ea 114399 069 6 32 x 3 16 hi top thread forming screw with serrations 5 ea 192308 003 M3 x 5mm hi top taptite screw with serrations 4 ea 247348 001 6 32 x 3 16 buttonhead tamper resistant taptite screw with serrations 3 ea 296769 002 6 32 x 5 16 hi top taptite screw 4 ea 109834 568 6 19 x 1 2 Panhead plastite screw 5 ea 101346 071 Thumbscrew molded cap 4 ea 179333 002 Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 2 7 2 8 Miscellaneous Parts not illustrated Spare Part Warranty Description Number Tier Mouse Scroll Opal 334689 002 D 2 9 Shipping Boxes not illustrated Description Spare Part Number Return Kit 166990 002 2 10 Documentation and Software not illustrated Description Spare Part Number Maintenance amp Service Guide 215879 001 Illustrated Parts Map 215880 001 Service Reference Guide 152611 001 Quick Troubleshooting Guide 153837 001 2 8 Spare Parts
7. Only authorized technicians trained by Compaq should attempt to repair this equipment Compaq Computer Corporation reserves the right to make changes to the these models without notice Symbols and Conventions The following text and symbols mark special messages throughout this guide AN WARNING Text set off in this manner indicates that failure to follow directions in the warning could result in bodily harm or loss of life CAUTION Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of data Text set off in this manner presents commentary sidelights clarifying information or specific instructions Technician Notes AN WARNING Only authorized technicians trained by Compaq should attempt to repair this equipment All troubleshooting and repair procedures are detailed to allow only subassembly module level repair Because of the complexity of the individual boards and subassemblies no one should attempt to make repairs at the component level or to make modifications to any printed wiring board Improper repairs can create a safety hazard Any indications of component replacement or printed wiring board modifications may void any warranty AN WARNING To reduce the risk of electric shock or damage to the equipment e Do not disable the power grounding plug The grounding plug is an important safety feature e Plug the power cord into a grounded earthed
8. amp Current Address Regsiter Channel 4 5 6 7 DMA Base amp Current Address Register Channel 0 1 2 3 DMA Base amp Current Count Register Channel 4 5 6 7 DMA Base amp Current Count Register Aliased at 00h OFh Master PIC ICW1 Init Cmd Word 1 Register Master PIC OCW2 Op Ctrl Word 2 Register Master PIC OCW3 Op Ctrl Word 3 Register Master PIC ICW2 Init Cmd Word 1 Register Master PIC ICWS Init Cmd Word 1 Register Master PIC ICWA Init Cmd Word 1 Register Master PIC OCW1 Op Ctrl Word 3 Register Aliased at 20h 21h Counter 0 Interval Time Status Byte Format Counter 0 Counter Access Port Register Counter 1 Interval Time Status Byte Format Counter 1 Counter Access Port Register Counter 2 Interval Time Status Byte Format Counter 2 Counter Access Port Register Timer Control Word Register Timer Control Word Register Read Back Counter Latch Command Aliased at 40h 43h NMI Status and Control Register NMI Enable Register Real Time Clock Standard RAM Index Register Real Time Clock Standard RAM Target Register Extended RAM Index Register Extended RAM Target Register Aliased at 70h 71h Aliased at 72h 73h or 70h 71h Channel 2 3 1 DMA Memory Low Page Register Reserved Page Registers Channel 6 7 5 DMA Memory Low Page Register Reserved Page Registers Refresh Low Page Register Aliased at 81h 8Fh Fast A20 and INIT Register continued Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 6 3 6 4
9. 11 2 Lift the battery out of the holder Slide the replacement battery into position with the positive side up The battery holder automatically secures the battery in the proper position If you removed expansion boards reinstall them now Replace the computer access panel Reassemble the computer Reconnect the AC power cord and turn on the computer Reset the date and time your passwords and any special system setups using Compaq Computer Setup WARNING This computer contains a lithium battery There is a risk of fire and chemical burn if the battery pack is handled improperly Do not disassemble crush puncture short external contacts dispose in water or fire or expose it to temperatures higher than 60 C 140 F In North America dispose of nickel metal hydride or lithium batteries by taking advantage of the Compaq battery recycling program You will be provided with a postage paid battery pack mailer listed for your location in the Contacting Customer Support guide for more information X preaddressed to a reclamation facility where the metals are recycled Call the telephone number In Europe do not dispose of batteries with general household waste Dispose of or recycle them by using the public collection system or returning them to Compaq your authorized Compaq partners or their agents Removal amp Replacement Procedures 4 17 Chassis Fan Assembly Q If the unit has a 866 933MHz processor it requ
10. 3 Disconnect the power cord from the electrical outlet and then from the computer 4 Disconnect all peripheral device cables from the computer S During disassembly label each cable as you remove it noting its position and routing Keep all screws with the components removed N CAUTION The screws used in the computer are of different thread sizes and lengths using the wrong screw in an application may damage the unit A WARNING To reduce the risk of personal injury from hot surfaces allow the internal system components to cool before touching DN CAUTION Static electricity can damage the electronic components of the computer or optional equipment Before beginning these procedures ensure that you are discharged of static electricity by briefly touching a grounded metal object For more information refer to Chapter 3 Removal and Replacement Preliminaries Removal Replacement Procedures 4 3 Feet Installation Four 4 rubber feet are mounted to the chassis as shown below No parts have to be removed to access the feet The replacement feet have an adhesive surface and are shipped with a protective backing in place Remove the backing from the feet before installation If necessary remove the old feet and remove any adhesive residue from the chassis Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 3 4 4 4 4 Cable Lock WARNING To avoid injury use care in handling the separated pie
11. 4 6 4 Slide the drivelock mechanism to unlock the drive O 5 While the drivelock is held in the unlatched position remove the drive from the drive bay O 6 Remove the guide screws from the drive To install a new drive 1 Install two guide screws on each side of the replacement drive Q Metric screws M3 have a black finish while U S screws 6 have a silver finish CD and DVD drives use black metric screws 2 Ensure that the guide screw lines up with the guide slots then gently slide the drive into the drive bay until it snaps into place 3 Connect the power and signal cables to the back of the drive 4 Remove the bezel blank from the subpanel if necessary Section 4 8 5 Reinstall the subpanel and the front bezel The system automatically recognizes hard drives sold by Compaq or any other plug and play hard drive and will automatically reconfigure the computer If you installed a third party hard drive or one that is not a plug and play device you must run Computer Setup to reconfigure the computer Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 13 4 10 3 Removing an External 3 5 Inch Drive If you are installing a second 3 5 inch diskette drive into 5 25 inch bays 1 or 2 for the first time you must use a special adapter bracket If you are installing a 3 5 inch diskette drive into 5 25 inch bay 3 you must use a special adapter bracket If installing a second ATA hard drive on the pr
12. Activity Light e Diskette Eject Button o Dual State Power Button 9 Drive Activity Light 6 Power On Light CD ROM models only Flashes when an ATAPI device such as the hard drive is active 1 2 Product Description 1 1 2 Rear Panel Connectors Ref Component Ref Component o Mouse Connector eo Monitor Connector e Keyboard Connector 7 Headphone Line Out Audio Connector e Universal Serial Bus USB e Serial Connector Connectors 2 connects the computer to any USB peripheral while the computer is operating is a fully functional plug and play connector o Serial Connector Line In Audio Connector Parallel Port Connector O Microphone Connector Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 1 3 1 1 3 1 4 Drive Positions Reference Drive Bay 0 0 1 2 e 3 0 0 4 5 Configuration Two standard 5 25 inch half height bays for optional drives One standard 3 5 inch 1 44 MB diskette drive mounted with a drive adapter into a 5 25 inch bay Two standard 3 5 inch drive bays Bay 4 contains the preinstalled hard drive Bay 5 is available for an optional hard drive Drive bay numbers are stamped on the chassis To verify the type and size of the mass storage devices installed in the computer run F10 Compaq Computer Setup Product Description 1 2 Serial Number Location The serial number and model information label is located on the access panel of the unit A se
13. it can damage the unit Compaq strongly recommends that all screws removed during disassembly be kept with the part that was removed then returned to their proper locations As each subassembly is removed from the computer it should be placed away from the work area to prevent damage Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 3 5 3 3 4 3 3 9 3 3 6 3 6 Cables and Connectors Most cables used throughout the unit are flat flexible cables These cables must be handled with care to avoid damage Apply only the tension required to seat or unseat the cables during insertion or removal from the connector Handle cables by the connector whenever possible In all cases avoid bending or twisting the cables and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts being removed or replaced CAUTION When servicing this computer ensure that cables are placed in their proper location during the reassembly process Improper cable placement can damage the computer Hard Drives Handle hard drives as delicate precision components avoiding all physical shock and vibration This applies to failed drives as well as replacement spares E fa drive must be mailed place the drive in a bubble pack mailer or other suitable protective packaging and label the package Fragile Handle With Care W Do not remove hard drives from the shipping package for storage Keep hard drives in
14. parts from assemblies in protective packaging or conductive foam Personal Grounding Methods and Equipment Use the following equipment to prevent static electricity damage to equipment W Wrist straps are flexible straps with a minimum of one megohm 10 resistance in the ground cords To provide proper ground a strap must be worn snug against bare skin The ground cord must be connected and fit snugly into the banana plug connector on the grounding mat or workstation m Heel straps Toe straps Boot straps can be used at standing workstations and are compatible with most types of shoes or boots On conductive floors or dissipative floor mats use them on both feet with a minimum of one megohm 10 resistance between the operator and ground Static Shielding Protection Levels Method Voltage Antistatic plastic 1 500 Carbon loaded plastic 7 500 Metallized laminate 15 000 Grounding Workstations To prevent static damage at the workstation use the following precautions W Cover the workstation with approved static dissipative material Provide a wrist strap connected to the work surface and properly grounded tools and equipment Use static dissipative mats foot straps or air ionizers to give added protection Handle electrostatic sensitive components parts and assemblies by the case or PCB laminate Handle them only at static free workstations W Turn off power and input signals before inserting and removing connectors or
15. the computer before cleaning the keyboard mouse or air vents Disconnect the keyboard before cleaning it Wear safety glasses equipped with side shields when cleaning the keyboard Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 3 3 3 2 2 3 2 3 3 2 4 3 4 Cleaning the Computer Case Follow all safety precautions in Section 3 2 1 before cleaning the computer To clean the computer case follow the procedures described below W To remove light stains or dirt use plain water with a clean lint free cloth or swab W For stronger stains use a mild dishwashing liquid diluted with water Rinse well by wiping it with a cloth or swab dampened with clear water E For stubborn stains use isopropyl rubbing alcohol No rinsing is needed as the alcohol will evaporate quickly and not leave a residue After cleaning always wipe the unit with a clean lint free cloth Occasionally clean the air vents on the computer Lint and other foreign matter can block the vents and limit the airflow Cleaning the Keyboard Follow all safety precautions in Section 3 2 1 before cleaning the keyboard To clean the tops of the keys or the keyboard body follow the procedures described in Section 3 2 2 When cleaning debris from under the keys review all rules in Section 3 2 1 before following these procedures CAUTION Use safety glasses equipped with side shields before attempting to clean debris from under the keys W Visi
16. the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures 2 Lay the computer down on its large base for greater stability 3 Loosen the two thumbscrews that secure the access panel to the back of the computer chassis 4 Slide the access panel backward approximately 1 inch 2 5 cm then lift it up and off the unit To replace the access panel reverse the previous steps Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 5 4 6 Front Bezel 1 Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures 2 Remove the access panel Section 4 5 3 Press the release tabs O on the side of the front bezel 4 Rotate the front bezel away from the chassis to remove it from the unit O BQ When replacing the front bezel ensure that the bottom hinge points are properly placed in the chassis before rotating the front bezel back into its original position 4 6 Removal amp Replacement Procedures 4 7 Power Button 1 Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power switch is turned off To preven
17. their protective packaging until they are actually mounted in the CPU Avoid dropping drives from any height onto any surface If you are inserting or removing a hard drive turn off the computer Do not remove a hard drive while the computer is on or in standby mode W Before handling a drive ensure that you are discharged of static electricity While handling a drive avoid touching the connector For more information about preventing electrostatic damage refer to Section 3 1 Electrostatic Discharge Do not use excessive force when inserting a drive Avoid exposing a hard drive to liquids temperature extremes or products that have magnetic fields such as monitors or speakers Lithium Coin Cell Battery The battery that comes with the computer provides power to the real time clock and has a minimum lifetime of about three years See Chapter 4 Removal and Replacement Procedures for instructions on the replacement procedures WARNING This computer contains a lithium battery There is a risk of fire and chemical burn if the battery is handled improperly Do not disassemble crush puncture short external contacts dispose in water or fire or expose it to temperatures higher than 140 F 60 C CAUTION Batteries battery packs and accumulators should not be disposed of together with the general household waste Removal amp Replacement Preliminaries chapter 4 REMOVAL AND REPLACEMENT PROCEDURES This chap
18. 12 000 V Motions of bench worker 400 V 800 V 6 000 V Removing DIPs from plastic tube 400 V 700 V 2 000 V Removing DIPs from vinyl tray 2 000 V 4 000 V 11 500 V Removing DIPs from Styrofoam 3 500 V 5 000V 14 500V Removing bubble pack from PCB 7 000V 20 000V 26 500 V Packing PCBs in foam lined box 5 000 V 11 000V 21 000 V Dual Inline Packaging DIP is the packaging around individual microcircuitry These are then multi packaged inside plastic tubes trays or Styrofoam amp 700 volts can degrade a product Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 3 1 3 1 2 3 1 3 3 1 4 3 2 Preventing Electrostatic Damage to Equipment Many electronic components are sensitive to ESD Circuitry design and structure determine the degree of sensitivity The following proper packaging and grounding precautions are necessary to prevent damage to electric components and accessories W To avoid hand contact transport products in static safe containers such as tubes bags or boxes W Protect all electrostatic parts and assemblies with conductive or approved containers or packaging W Keep electrostatic sensitive parts in their containers until they arrive at static free stations Place items on a grounded surface before removing them from their container Always be properly grounded when touching a sensitive component or assembly Avoid contact with pins leads or circuitry Place reusable electrostatic sensitive
19. 2 5 1 3 Disabling or Clearing the Power On and Setup Passwords 5 3 5 2 Hard Drive Jumper Settings insirri iaer e E sE EEE are a EE ii 5 4 5 2 1 Seagate Quantum and Western Digital oncnncnnncinocinnnnonnnanonancnancnnnconocnocanoss 5 4 322 O eese She Do ROG ep IR R DD Deren ep rote 5 5 Contents m chapter 6 Specifications Os Specification pit 6 1 GEL SyStEI sia td teen nb en etes 6 1 6 1 2 System Intertupts eunti eue gingen a 6 2 6 1 3 System DMA sd eer pU Um ETE 6 2 61 4 ICH Fixed VO Registers 2e eee eerte tube ats 6 3 6 1 5 System Memory Maps iia eee d RR Reines 6 5 6 2 DIVES Hep SRM E a st E ETA 6 6 6 2 1 J 44 MB Diskette Drive ice dire to Hoster e diate beue HRS 6 6 6 2 2 Ultra ATA Hard Dives easan r r A co noco neon reete 6 7 6 23 CD ROM Drive iei e iie iesu dee e cr dee ee ite 6 8 6 3 Compaq Keyboard uuu nO enne 6 9 6 4 Scroll MOUSE c5 et teet ei pa 6 9 6 5 Supported Graphics ResOlUtIONS oooocnonnnonnconononononononcnncnnnco nono nooo conoce enne nennen nenne 6 10 6 4 Intel 3D Graphies rientro menie pei ite eredi 6 10 6 5 2 nVIDIA M64 Pro oed ERR He OR Reden 6 10 UNDG e T caidas El Contents V preface ABOUT THIS GUIDE This Maintenance amp Service Guide is a troubleshooting and repair guide that can be used for reference when servicing the Compaq Deskpro EX Series of Personal Computers Minitower Model
20. 6 MB s 66 6 MB s 5400 0 2 CD ROM Drives Compaq Spare Part Number Data Buffer ms Data Transfer Rate Access Time ms Random Full Stroke Seek Cache Buffer Interface Disk Formats Read Disk Capacity Block Size Diameter Thickness Track Pitch Audio Output Level Line Out Headphone Startup Time Operating Conditions Temperature Humidity Dimensions mm HxWxD Weight grams 48X Max 187263 001 16 6 150 KB s Min audio CD 3000 7200 KB s 100 150 128 KB ATAPI Photo CD Multisession CD ROM Multi Read CD TEXT Audio CD CD I CD RW CD R CD EXTRA CD ROM XA CD 650 MB Mode 1 2048 bytes Mode 2 2340 2336 bytes CD DA 2353 bytes CD XA 2328 bytes 12 cm 8 cm 1 2 mm 1 6 um 0 7 V 47 K ohm 0 6 V 32 ohm lt 7 sec typical 30 sec with multisession 5 45C 10 80 relative humidity 42 9x150 1x208 1200 MPEG Playback Graphics None Solution Support Specifications 6 3 6 4 Compaq Keyboard Compaq Easy Access Dimensions Height 1 4 in Width 18 3 in Depth 6 3 in Scroll Mouse Dimensions Height 1 34 in Length 4 45 in Width 2 36 in Weight 4 59 oz Base Resolution 400 dpi Tracking Speed 10 in sec maximum Temperature Operating 50 F to 104 F Non operating 22 F to 140 F Lifetime Mechanical 300 miles Switch 1 million operations Relative Humidity Operating 10 to 90 Non operating 20 to 80 Compaq
21. COMPAQ Maintenance amp Service Guide Compaq Deskpro EX and Deskpro EXS Series of Personal Computers Minitower Models COMPAQ Maintenance amp Service Guide Compaq Deskpro EX and Deskpro EXS Series of Personal Computers Minitower Models Notice 2000 Compaq Computer Corporation Except for use in connection with the accompanying Compaq product no part of this guide may be photocopied or reproduced in any form without prior written consent from Compaq Computer Corporation COMPAQ the Compaq logo and Deskpro Registered in U S Patent and Trademark Office are trademarks of Compaq Information Technologies Group L P Microsoft Windows Windows NT and other names of Microsoft products referenced herein are trademarks or registered trademarks of Microsoft Corporation Intel and Pentium are registered trademarks of Intel Corporation Celeron and MMX are trademarks of Intel Corporation All other product names mentioned herein may be trademarks or registered trademarks of their respective companies Compaq shall not be liable for technical or editorial errors or omissions contained herein The information in this document is subject to change without notice THE INFORMATION IN THIS PUBLICATION IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND THE ENTIRE RISK ARISING OUT OF THE USE OF THIS INFORMATION REMAINS WITH RECIPIENT IN NO EVENT SHALL COMPAQ BE LIABLE FOR ANY DIRECT CONSEQUENTIAL INCIDENTAL SPECIAL PUNITI
22. Card 2 3 Nvidia graphics card 2 3 power supply 2 1 processor 2 3 return kit 2 5 system board 2 3 specifications CD ROM 6 8 diskette drive 6 6 graphics 6 10 hard drive 6 7 keyboards 6 9 mouse 6 9 system 6 1 subpanel and bezel blanks removal and replacement 4 8 system specifications 6 1 system board connector locations 5 1 connectors and jumpers 5 1 removal and replacement 4 31 spare part number 2 3 system specifications DMA 6 2 T O 6 3 memory map 6 5 T tools required 3 5 U Ultra ATA devices 4 11
23. DRAM DIMMS upgradeable to 512 MB The memory sockets on the Intel 815 chipset based system board can be populated with industry standard DIMMs These memory module slots are populated with at least one preinstalled memory module To achieve the maximum memory support you may be required to replace the preinstalled DIMM with a higher capacity DIMM For proper system operation the DIMMs must be industry standard 168 pin unbuffered PC100 or PC133 compliant SDRAM DIMMs depending on the model The SDRAM DIMMs must support CAS Latency 2 or 3 CL 2 or CL 3 They must also contain the mandatory Joint Electronic Device Engineering Council JEDEC Serial Presence Detect SPD information DIMMs constructed with x4 SDRAM 16 ICs per side are not supported the system will not start using unsupported DIMMs The Intel 815 chipset supports both PC100 and PC133 SDRAM DIMMs PC133 DIMMs should be used for optimal performance If both PC100 and PC133 SDRAM DIMMs are installed in a computer the system memory will run at the lower 100Mhz speed Some configurations of PC133 SDRAMs may run at 100Mhz instead of 133Mhz Memory Module Installation CAUTION Your memory module sockets have gold metal contacts When upgrading your memory it is important to use memory modules with gold metal contacts to prevent corrosion and or oxidation resulting from having incompatible metals in contact with each other i CAUTION Static electricity can damage th
24. Deskpro EX and Deskpro EXS Series of Personal Computers 6 9 3 4 cm 11 3 cm 6 0 cm 130g 15 8 dp 25 cm sec 10 C to 50 C 30 C to 60 C 483 km 1 million operations 10 to 90 20 to 80 6 5 6 5 1 6 5 2 6 10 Supported Graphics Resolutions Intel 3D Graphics Colors 256 640 x 480 85 Hz 800 x 600 85 Hz 1024 x 768 85 Hz 1152 x 864 85 Hz 1280 x 1024 85 Hz 1600 x 1200 85 Hz nVIDIA M64 Pro Color Depth Mode bits pixel 640 x 480 8 16 32 800 x 600 8 16 32 1024 x 768 8 16 32 1152 x 864 8 16 32 1280 x 1024 8 16 32 1600 x 1200 8 16 1600 x 1200 32 1920 x 1080 8 16 1920 x 1080 32 1920 x 1200 8 16 Specifications 65K 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 16 7M 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz Refresh Rate Hz 60 72 75 85 60 72 75 85 60 70 75 85 60 70 72 75 85 60 70 72 75 85 60 70 72 75 85 60 60 70 72 75 85 60 60 70 72 75 85 A access panel removal and replacement 4 5 AGP card spare part number 2 3 AGP retention mechanism 4 22 AIMM card spare part number 2 3 B battery proper disposal 4 32 removal and replacement 4 32 C cable kit spare part number 2 2 cable lock removal and replacement 4 4 cable select feature 4 11 CD ROM specifications 6 8 CD ROM drive spare part number 2 2 cleaning computer 3 4 keyboard 3 4 monitor 3 4 mouse 3 5 clearing CMOS 5 2 clearing passwords 5 3 CMOS clearing configuration 5 2 computer cl
25. VE OR OTHER DAMAGES WHATSOEVER INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF BUSINESS PROFITS BUSINESS INTERRUPTION OR LOSS OF BUSINESS INFORMATION EVEN IF COMPAQ HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND WHETHER IN AN ACTION OF CONTRACT OR TORT INCLUDING NEGLIGENCE The limited warranties for Compaq products are exclusively set forth in the documentation accompanying such products Nothing herein should be construed as constituting a further or additional warranty The following words and symbols mark special messages throughout this guide WARNING Text set off in this manner indicates that failure to follow directions could result in bodily harm or loss of life CAUTION Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of information Maintenance amp Service Guide Compaq Deskpro EX and Deskpro EXS Series of Personal Computers Minitower Models First Edition September 2000 Part Number 201856 001 Spare Parts Number 215879 001 Compaq Computer Corporation CONTENTS preface About This Guide Symbols and Conventions 00 0 cece eecesecssecesecsseceecseeeeecesecssecsaecsaecsaecseecsaseaeseeeesseeaecaecsaeeaes Vii Technician Notes ter Sua doen coca ERO E eie ERN EE vii Locating Additional Information esses enne nennen nennen ennt nnne viii chapter 1 Product Description L1 Computer Features te rete de OR rre tp
26. an Internal 3 5 Inch Hard Drive eese 4 12 4 10 2 Removing an External 5 25 Inch Drive sese 4 13 4 10 3 Removing an External 3 5 Inch Drive sese 4 14 4 11 Expansion Boards 88 oh aS scp ada 4 16 4 11 1 Expansion Board Slots eene eee tes eet 4 16 4 11 2 Removing a PCI Expansion Board eene 4 17 4 11 3 Installing a PCI Expansion Board seen 4 18 4 12 System Memory eee eee es 4 20 4 T3 Graphics Cards iii ee e eate eet 4 22 4 13 1 Graphics Performance Accelerator GPA AGP Inline Memory Module AIMM Card with a Type I Retention Mechanism sss 4 22 4 13 2 AGP Card with a Type I Retention Mechanism see 4 25 4 13 3 GPA AIMM Card with a Type 2 Retention Mechanism 4 26 4 13 4 AGP Card with a Type 2 Retention Mechanism eee 4 27 4 13 5 Standard AGP Expansion Card sse 4 28 AVA POCO BRIE RRs ROBES oo 4 29 4 45 System BOA oi eerte ettet ende ta ce piede 4 31 4 T6 Battery is isco ele sie ae UBI eR uU OR P Ras 4 32 4 17 Chassis Fan Assembly e eerte D na cen den ie aeneis 4 33 ALS Power Supply see eA Pa Be eG MA essc ee at 4 34 chapter 5 Connectors amp Jumpers 3 1 System Board sec non tao HS 5 1 5 1 1 Connectors and Jumpers sse nennen trennen rennen 5 1 5 1 2 Clearing CMOS iiie A UREURDDII Da rere 5
27. art number 2 3 miscellaneous screw kit spare part number 2 4 monitor cleaning 3 4 mouse cleaning 3 5 spare part number 2 5 specifications 6 9 N Network Interface Card spare part number 2 3 Nvidia graphics card spare part number 2 3 P passwords 5 3 power button removal and replacement 4 7 power supply fan 3 5 removal and replacement 4 34 spare part number 2 1 power switch removal and replacement 4 0 power on passwords 5 3 processor removal and replacement 4 29 spare part number 2 3 1 2 Index R removal and replacement access panel 4 5 battery 4 32 cable lock 4 4 expansion boards 4 16 external 3 5 inch drive 4 14 external 5 25 inch drive 4 13 fan assembly 4 33 feet 4 3 front bezel 4 6 graphics cards 4 22 hard drive 4 12 memory 4 20 power button 4 7 power supply 4 34 power switch 4 9 processor 4 29 subpanel and bezel blanks 4 8 system board 4 31 required tools and software 3 5 retention mechanism 4 22 return kit spare part number 2 5 S screws using correct 3 5 serial number location 1 5 service considerations 3 5 setup passwords 5 3 software required 3 5 spare part number AGP card 2 3 AIMM card 2 3 cable kit 2 2 CD ROM drive 2 2 DIMM 2 3 diskette drive 2 2 documentation 2 5 front bezel 2 1 graphics cards 2 3 hard drive 2 2 keyboards 2 4 memory 2 3 miscellaneous screw kit 2 4 mouse 2 5 Network Interface
28. ber Tier 1 Diskette drive 3 5 inch 158266 001 D 2 48X Max tray load IDE CD ROM drive 187263 001 B 3 10 0 GB Ultra ATA hard drive 66 5400 quiet 203139 001 B 15 0 GB Ultra ATA hard drive 66 5400 202903 001 B Not shown nn nnnn hard drive transfer rate MBytes sec RPM Ultra ATA 100 hard drives are backwards compatible with Ultra ATA 66 devices however the data transfer rate is reduced to 66MB sec Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 2 3 2 3 Cables Spare Part Warranty Description Number Tier Cable Kit includes 192264 001 B 1 Single device hard drive CD ROM cable 18 108950 019 2 Audio cable 21 387527 001 Single device hard drive CD ROM cable 12 5 105876 001 j Audio cable 21 288489 002 not used for this product 3 Single device hard drive CD ROM cable 9 75 108950 021 4 Dual device hard drive CD ROM cable 18 10 to the first 196667 001 B connector Power switch LED cable 199854 001 B Diskette drive cable 161735 001 B CD audio cable 149806 001 D Not shown 2 4 Spare Parts 2 4 Standard Memory and Expansion Boards gt Spare Part Warranty Description Number Tier 1 Nvidia M64 16MB SDRAM AGP Card 182757 001 B 5 AIMM GPA 4MB 133MHz for graphics 192012 001 B Memory Module SDIMM 133 MHz 2 128 MB 170081 001 B 256 MB 192014 001 B Intel Pentium III Processor 3 566 66 MHz with heatsi
29. ble debris underneath or between the keys may be removed by vacuuming or shaking W Canned pressurized air may be used to clean debris from under the keys Caution should be used as too much air pressure can dislodge lubricants applied under the wide keys W If you remove a key use a specially designed key puller to prevent damage to the keys This tool is available through many electronic supply outlets CAUTION Never remove a wide leveled key like the space bar from the keyboard If these keys are improperly removed or installed the keyboard may not function properly W Cleaning under a key may be done with a swab moistened with isopropyl alcohol and squeezed out Be careful not to wipe away lubricants necessary for proper key functions Use tweezers to remove any fibers or dirt in confined areas Allow the parts to air dry before reassembly Cleaning the Monitor W Wipe the monitor screen with a clean cloth moistened with water or with a towelette designed for cleaning monitors Do not use sprays or aerosols directly on the screen the liquid may seep into the housing and damage a component Never use solvents or flammable liquids on the monitor m Toclean the monitor body follow the procedures in Section 3 2 2 Removal amp Replacement Preliminaries 3 2 5 3 3 3 3 1 3 3 2 3 3 3 Cleaning the Mouse Before cleaning the mouse ensure that the power to the computer is turned off W Clean the mouse ball by first re
30. ces of the cable lock bracket metal edges may be sharp Be sure to install the bracket so that sharp edges do not extend from the edges of the computer chassis Depending on the model the computer includes a cable lock provision which consists of a three piece security bracket The bottom part of the bracket is attached to the computer with a screw the top part of the bracket covers the screw and prevents its removal 1 Separate the pieces of the security bracket by bending the metal where the three pieces join 2 Slide the tab on the narrow piece of the bracket into the notch on the back of the computer and rotate this piece toward the screw hole then slide the U shaped piece of the bracket between the narrow piece and the computer 3 Position both pieces of the bracket over the screw hole and secure the bracket to the computer with the screw provided 4 Cover the screw with the flat portion of the security bracket 5 Install a padlock not provided to secure the top part of the security bracket and inhibit access to the inside of the computer Install a cable lock not provided to inhibit access to the interior of the computer and secure the computer to a fixed object To remove the cable lock provision reverse the above procedure Removal amp Replacement Procedures 4 5 Access Panel Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when
31. clear and reset the configuration perform the following procedure Prepare the computer for disassembly Section 4 2 CAUTION The power cord must be disconnected from the power source before pushing the Clear CMOS Button NOTE All LEDs on the board should be OFF Failure to do so may damage the system board 2 Remove the access panel Section 4 5 3 Press the CMOS button located on the system board and keep it depressed for 5 seconds 4 Replace the access panel 5 Turn the computer on 6 Run F10 Computer Setup to reconfigure the system 5 2 Connectors and Jumpers 5 1 3 Disabling or Clearing the Power On and Setup Passwords 1 Turn off the computer and any external devices and disconnect the power cord from the power outlet 2 Disconnect the keyboard monitor and any other external devices connected to the computer 3 Remove the computer cover 4 Locate the header and jumper labeled E49 5 Remove the jumper from pins 1 and 2 Place the jumper over pin 2 only in order to avoid losing it 6 Replace the computer cover 7 Reconnect the external equipment 8 Plug in the computer and turn on power Allow the operating system to start This clears the current passwords and disables the password features 9 To re enable the password features repeat steps 1 4 then replace the jumper on pins 1 and 2 10 Repeat steps 6 8 then establish new passwords Refer to the Computer Setup F10 Setup instr
32. cond barcode label is located on the rear of the unit O For the purpose of AssetControl the serial number is embedded in CMOS and in the EEPROM on the system board and may be accessed through Diagnostics for Windows If the system board is replaced with a spare part from Compaq the invalid serial number condition will be recognized during POST The original serial number must then be reentered through Computer Setup Refer to the Software Reference Guide for more information CAUTION A system board borrowed from another computer is recognized as a valid serial number and will create a mismatch between the serial number label and the electronic serial number The computer serial number should be provided to Compaq when requesting information or ordering spare parts Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 1 5 chapter 2 SPARE PARTS Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 2 1 2 1 2 2 System Unit f Til 1 _ Description NI ODO oa as o N Spare Parts Access panel Front bezel Chassis basepan Logo Kit only minitower version 166806 002 used Power switch with cable LED and switch holder Feet Power supply Spare Part Warranty Number Tier Not spared 166868 001 B Not spared 166924 001 B 199854 001 Misc Plastics Kit B 201828 001 B 2 2 Mass Storage Devices pe uoa f Spare Part Warranty Description Num
33. e Command Block Offset for Secondary Drive continued 6 1 5 ICH Fixed 1 0 Registers cont Register Name PIO Mode Command Block Offset for Primary Drive PIO Mode Control Block Offset for Secondary Drive PIO Mode Control Block Offset for Primary Drive Master PIC Edge Level Triggered Register PIO Mode Control Block Offset for Primary Drive Master PIC Edge Level Triggered Register Port 1FOh 1F7h 376h 3F6h 4DOh 3F6h 4DOh 4Dih 400 47F F800 F87F FA00 FA3F FC00 FCOF Slave PIC Edge Level Triggered Register Super I O Reserved power management Reserved GPIO management Reserved SMBUS controller NOTE When the POS DEC EN bit is set additional I O ports get positively decoded by the ICH System Memory Map Size 512 KB 3839 MB 511 MB 128KB 96 KB 32 KB 128 KB 640 KB Memory Address FFFFFFFFh to FFF80000 FFFBFFFFh to 10000000h OFFFFFFFh to 00100000h OOOFFFFFh to 000E0000h OOODFFFFh to 000C8000h 000C7FFFh to 000C0000h OOOBFFFFh to 000A0000h 0009FFFFh to 00000000h System Function System ROM PCI Memory Expansion HOST or PCI Memory Expansion System ROM PCI Option ROMs Video ROM Video RAM Base Memory Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 6 5 6 2 Drives 6 2 1 1 44 MB Diskette Drive Size and Capacity Size in 3 5 High Density MB 1 44 Low Density KB 720 Compag Spare Part Number 210795 001 Light Green Drive Rotation rpm 300 Height One third 1 inch
34. e electronic components of the computer or optional cards Before beginning these procedures ensure that you are discharged of static electricity by briefly touching a grounded metal object Refer to Appendix F Electrostatic Discharge for more information i CAUTION When handling a memory module be careful not to touch any of the contacts Doing so may damage the module 4 20 Removal amp Replacement Procedures To install a memory module complete the following steps l Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures 2 Remove the access panel Section 4 5 3 Open both latches of the memory socket O and insert the memory module into the socket 4 A memory module can be installed in only one way Match the notch on the module with the tab on the memory socket Push the module down into the socket ensuring the module is securely seated Close both latches 5 Repeat step 4 for any additional modules you want to install 6 Reassemble the computer T Turn on the computer When a memory module has been removed moved or added Memory Change Alerts a feature of Intelligent Manageability alerts the system administrator and end user The system automatically recogniz
35. e with Ultra ATA Devices Optional drives are available from Compaq in kits that include a special drive cable The configuration of the drives employs a cable select feature that identifies the drives as device O primary drive or device 1 secondary drive The system board determines which drive is device 0 or device 1 based on the way the drives are connected to the special drive cable The device 0 drive is the drive connected to the short segment of the drive cable or that connector closest to the system board the device 1 drive is the drive connected to the long segment of the drive cable Drive installation requires no jumper setting changes on the existing or optional drives All Compaq drives have the jumpers preset for cable select installation If installing a second device on the primary controller you must use an 80 conductor Ultra ATA cable for optimal performance This cable is available as a Compaq option Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 11 4 10 1 Removing an Internal 3 5 Inch Hard Drive Prepare the computer for disassembly Section 4 2 Remove the access panel Section 4 5 Remove the front bezel Section 4 6 Disconnect the power and data cables from the back of the hard drive Slide the drivelock mechanism to unlock the hard drives O Qv pAc de nos dpa ips While holding the drivelock in the unlocked position remove the drive from the drive bay O 7 Remove the
36. eaning 3 4 Computer Features Rear Panel Connectors 1 3 configurations drives 4 10 connectors and jumpers 5 1 Index D DIMM spare part number 2 3 DIMMs 4 20 disassembly chart 4 1 disassembly preparation 4 2 diskette drive spare part number 2 2 specifications 6 6 DMA settings and specifications 6 2 documentation spare part number 2 5 drive configurations 4 10 drive positions 1 4 E electrostatic discharge ESD 3 1 ESD See electrostatic discharge expansion boards removal and replacement 4 16 external 3 5 inch drive removal and replacement 4 14 external 5 25 inch drive removal and replacement 4 13 F fan assembly removal and replacement 4 33 feet removal and replacement 4 3 front bezel removal and replacement 4 6 spare part number 2 1 Front Panel Controls and LEDs 1 2 G graphics specifications 6 10 graphics cards removal and replacement 4 22 spare part number 2 3 grounding methods 3 2 H hard drive jumpers 5 4 proper handling 3 6 removal and replacement 4 12 spare part number 2 2 specifications 6 7 I I O Registers 6 3 INSPECT utility 4 10 IRQ settings 6 2 J jumpers hard drive 5 4 K keyboard cleaning 3 4 keyboards spare part number 2 4 specifications 6 9 L line out audio connector 1 3 Index H1 M memory removal and replacement 4 20 spare part number 2 3 standard 2 3 memory map 6 5 microprocessor spare p
37. el blanks to remove them from the subpanel CAUTION When replacing the subpanel ensure that the aligning pins and any remaining bezel blanks are in the proper orientation to prevent damage to the alignment pins BQ The subpanel has markings on it to facilitate installation 4 8 Removal amp Replacement Procedures 4 9 Power Switch Assembly CAUTION The power switch should not be removed from the switch holder Doing so may damage the switch components 1 Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures Lay the computer down on its large base for greater stability Remove the access panel Section 4 5 Remove the front bezel Section 4 6 Disconnect the power LED cable from the system board O gv ve spes os de Push the release tab toward the drive bays then remove the power switch assembly from the chassis To install the new power switch reverse the above procedure pushing the switch assembly until it snaps into place The power LED connector is keyed to ensure proper installation Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 9 4 10 Mass Storage Devices The Compaq Deskpro EX Series of Personal Computers support up to five drives in various configurat
38. electrical outlet that is easily accessible at all times e Disconnect the power from the computer by unplugging the power cord either from the electrical outlet or the computer CAUTION To properly ventilate your system you must provide at least 3 inches 7 6 cm of clearance at the front and back of the computer Compaq Deskpro EX and Deskpro EXS Series of Personal Computers vii Locating Additional Information The following documentation is available to support these products User Documentation Technical Training Guides Compaq Service Advisories and Bulletins Compaq QuickFind Technical Reference Guide Compaq Quick Reference Guide Compaq Service Reference Guide Compaq Quick Troubleshooting Guide Viii About This Guide chapter y PRODUCT DESCRIPTION This chapter describes the model offerings and features of the Compaq Deskpro EX Series of Personal Computers Minitower Model Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 1 1 1 1 Computer Features Compaq Deskpro EX Series of Personal Computers Minitower Model ships with a mouse and keyboard Some models are also equipped with a CD ROM drive A Compaq color monitor or other compatible monitor does not ship with the computer 1 1 1 Front Panel Controls and LEDs Ref Component Function Ref Component Function 0 Stereo Headphone Jack 6 CD ROM Eject Button e Headphone Volume Control O CD ROM Drive Busy Indicator e Diskette Drive
39. es the added memory Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 21 4 13 Graphics Cards The AGP expansion slot may come with a retention mechanism installed around it to hold the graphics cards securely in place There are two different types of retention mechanisms that may be installed around the AGP expansion slot 4 13 1 Graphics Performance Accelerator GPA AGP Inline Memory Module AIMM Card with a Type Retention Mechanism Removing a GPA AIMM Card 1 Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures Lay the computer down on its large base for greater stability Remove the access panel Section 4 5 Pull the arm on the right side of the retention mechanism O cce com ES At the same time rotate the front of the GPA AIMM card up until it is at a 45 degree angle 6 Remove the card from the expansion slot 4 22 Removal amp Replacement Procedures Installing a GPA AIMM Card WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures 1 Prepare the computer for disasse
40. guide screws from the drive 8 Install two guide screws on each side of the replacement drive use silver screws BQ Metric screws M3 have a black finish while U S screws 6 have a silver finish Replace the 3 5 inch drive by reversing the above procedure A CAUTION When servicing the computer ensure that cables are placed in their proper locations during the reassembly process Improper cable placement can damage the computer a CAUTION Use only 3 16 inch or 5 mm long screws as guide screws Longer screws can damage the internal components of the drive When installing a second ATA hard drive on the primary controller you must use an 80 conductor ATA cable for optimal performance The system automatically recognizes hard drives sold by Compaq or any other plug and play hard drive and will automatically reconfigure the computer If you installed a third party hard drive or one that is not a plug and play device you must run Computer Setup to reconfigure the computer 4 12 Removal amp Replacement Procedures 4 10 2 Removing an External 5 25 Inch Drive Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures 2 Remove the access panel Section 4 5 3 Remove the front bezel Section
41. he graphics card reverse the above procedures Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 25 4 13 3 4 26 GPA AIMM Card with a Type 2 Retention Mechanism Removing a GPA AIMM Card l Prepare the computer for disassembly Section 4 2 2 Lay the computer down on its large base for greater stability 3 Remove the access panel Section 4 5 4 5 Pull the arm on the right side of the retention mechanism Pull the card straight up to remove it from the expansion slot To install the graphics card reverse the above procedures Removal amp Replacement Procedures 4 13 4 AGP Card with a Type 2 Retention Mechanism Removing an AGP Card Prepare the computer for disassembly Section 4 2 Lay the computer down on its large base for greater stability Remove the access panel Section 4 5 1 2 3 4 Remove the screw at the top of the expansion slot 5 Pull the arm on the right side of the retention mechanism 6 Pull the card straight up to remove it from the expansion slot y 3 i T To install the graphics card reverse the above procedures Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 27 4 13 5 4 28 Standard AGP Expansion Card Removing an AGP Card l Prepare the computer for disassembly Section 4 2 2 Lay the computer down on its large base for greater stability 3 Remove the access panel Section 4 5 4
42. imary controller you must use an 80 conductor ATA cable for optimal performance Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power Switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures 2 Remove the access panel Section 4 5 3 Remove the front bezel Section 4 6 Q The primary diskette drive is always installed in drive bay 3 4 Slide the drivelock mechanism to unlock the drive O 5 While the drivelock is held in the unlatched position remove the drive from the drive bay O 4 14 Removal amp Replacement Procedures 6 Remove the bracket brace O from the top of the drive adapter by squeezing inward on both sides then rotating the brace up and out 7 Remove the drive bezel O 8 Remove the three screws that secure the drive O to the drive adapter 9 Lift the drive out of the drive adapter 10 Remove the guide screws from the drive 9 Lc o qu To replace the drive reverse the previous procedures D DD The primary 3 5 inch diskette drive should only be installed into bay 3 Bay 3 is the bottom bay in the minitower When replacing the drive use the existing screws Metric screws M3 have a black finish while U S screws 6 have a silver finish Diskette drives use black metric screws The dri
43. ions JL Drive Positions Reference Drive Bay Configuration 00 1 2 Two standard 5 25 inch half height bays for optional drives e 3 One standard 3 5 inch 1 44 MB diskette drive mounted with a drive adapter into a 5 25 inch bay 00 4 5 Two standard 3 5 inch drive bays bay 4 contains the preinstalled hard drive bay 5 is available for an optional hard drive Bw Drive bay numbers are stamped on the chassis To verify the type and size of the mass storage devices installed in the computer run Computer Setup 4 10 Removal amp Replacement Procedures When installing additional drives follow these guidelines W For optimal performance connect hard drives to the primary controller Connect expansion devices such as CD ROM IDE tape and diskette drives to the secondary controller You may install either a third height or a half height drive into a half height bay You must install guide screws to ensure that the drive lines up correctly in the drive cage Compaq has provided extra guide screws which are installed in the front of the computer chassis behind the front bezel Some options require metric hardware Compaq supplied metric screws are black WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures Using the Cable Select Featur
44. ires an external chassis fan 1 Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures Remove the access panel Section 4 5 Disconnect the fan power cable from the system board Remove the four screws that secure the fan to the chassis Ue sme US db Remove the fan from the chassis 6 To install the fan assembly reverse the above procedure Bw This fan is used in units with 866 933 MHz processors Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 33 4 18 Power Supply 1 Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures 2 Lay the computer down on its large base for greater stability 3 Remove the access panel Section 4 5 4 Disconnect all power cables from the mass storage devices and the system board Power connectors are keyed for correct installation Note the orientation of each cable connector and the routing of the cables to facilitate reassembly 5 Remove the four screws that secure the power supply to the back of the chas
45. leshooting criteria can be found in the Compaq Quick Troubleshooting Guide part number 153837 001 and the Compaq Service Reference Guide part number 152611 001 1 Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures 2 Remove the access panel Section 4 5 3 Remove all expansion boards Section 4 11 B Disconnect any cables that are attached to the system board noting their location for reinstallation Remove the DIMMs optional Section 4 12 Remove the graphics card Section 4 13 Remove the six retaining screws that secure the system board to the chassis ADAM Slide the board about 1 2 inch toward the front of the chassis to disengage the I O panel then lift it up and out of the chassis To install a new system board reverse the above procedures Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 31 4 16 4 32 Battery 10 11 1 Prepare the computer for disassembly Section 4 2 2 Lay the computer down on its large base for greater stability 3 4 Locate the battery on the system board If you have expansion boards installed you Remove the access panel Section 4 5 may need to remove them to gain access to the battery Section 4
46. mbly Section 4 2 2 Lay the computer down on its large base for greater stability 3 Remove the access panel Section 4 5 4 Insert the hook O on the left side of the GPA AIMM card under the loop on the left side of the retention mechanism 5 Rotate the right side of the card down until it is at a 45 degree angle Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 23 6 With the GPA AIMM card at a 45 degree angle slide the card toward the back of the expansion slot until the fingers on the bottom of the card line up properly with the connectors in the expansion slot CAUTION The fingers on the bottom of the GPA AIMM card must be properly aligned with the expansion slot during installation Misalignment may result in damage to the card or the AGP connector 7 While pulling the arm on the right side of the retention mechanism O rotate the card down into the expansion slot until seated Q 4 24 Removal amp Replacement Procedures 4 13 2 AGP Card with a Type I Retention Mechanism Removing an AGP Card Prepare the computer for disassembly Section 4 2 Lay the computer down on its large base for greater stability Remove the access panel Section 4 5 1 2 3 4 Remove the screw at the top of the expansion slot 5 Pull the arm on the right side of the retention mechanism 6 Pull the card straight up to remove it from the expansion slot UY a A l l E To install t
47. moving the retaining plate and the ball from the housing Pull out any debris from the ball socket and wipe the ball with a clean dry cloth before reassembly W Toclean the mouse body follow the procedures in 3 2 2 Service Considerations Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer Power Supply Fan The power supply fan is a variable speed fan based on the temperature in the power supply CAUTION The cooling fan is off only when the computer is turned off or the power cable has been disconnected The cooling fan is always on in all other instances when the computer is either in the On Standby or Suspend mode You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage Tools and Software Requirements To service the computer you need the following Torx T 15 screwdriver Compaq screwdriver with bits PN 161946 001 W Flat bladed screwdriver may sometimes be used in place of the Torx screwdriver W Diagnostics software Compaq tamper resistant T 15 wrench Smart Cover FailSafe Key PN 166527 001 or Compaq tamper resistant bits Smart Cover FailSafe Key PN 166527 002 Screws The screws used in the computer are not interchangeable They may have standard or metric threads and may be of different lengths If an incorrect screw is used during the reassembly process
48. nk 191832 002 and clip 223575 007 203967 001 B 600 66 MHz with heatsink 191832 002 and clip 223575 007 192011 001 B i 667 133 MHz with heatsink 191832 002 and clip 223575 007 192007 001 B 700 66 MHz with heatsink 191832 002 and clip 223575 007 203968 001 B i 733 133 MHz with heatsink 191832 002 and clip 223575 007 192008 001 B 800 133 MHz with heatsink 191832 002 and clip 223575 007 192009 001 B T 866 133 MHz with fansink 191845 002 Fansink includes fan 192006 001 B heatsink and clip 933 133 MHz with fansink 191845 002 Fansink includes fan 203969 001 B heatsink and clip 4 10 100 PCI Network Interface Card 188297 001 B 6 System Board 203966 001 B Not shown Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 2 5 2 5 Miscellaneous Plastics Kit a a E a Spare Part Warranty Description Number Tier Miscellaneous Plastics Kit includes 166878 001 B Panel sub 166835 001 Bezel blank 166775 001 Diskette bezel 166776 001 Card guide 166778 001 Foot rubber 4 ea 166939 002 Button power 166774 001 Drivelock DT 166779 001 not used with this product Spring power button 166837 001 Springs drivelock 2 ea 166837 002 Drivelock MT 166780 001 Retention mechanism 2 ea 350767 001 Not shown O O NI oO oye oO pm E o 2 6 Spare Parts 2 6 2 7 Keyboards not illustrated Spare Part Warranty Description Number Tier
49. ompaq Deskpro EX and Deskpro EXS Series of Personal Computers 6 1 17 65 in 6 60 in 16 80 in 26 lb 90 132 Vac 120 127 Vac 47 63 Hz 5 5A 200W 50 to 95 F 4 to 140 F 20 to 80 10 to 90 10 000 ft 30 000 ft 44 83 cm 16 76 cm 42 67 cm 11 8 kg 180 264 Vac 200 240 Vac 47 63 Hz 3A 200W 10 to 35 C 20 to 60 C 20 to 80 10 to 90 3048 m 9144 m 6 1 2 6 1 3 6 2 System Interrupts Hardware IRQ AN Dat OO N O o 10 11 12 13 14 15 System DMA Hardware DMA NO 0d0AO0NDNRQ o Specifications System Function Timer Interrupt Keyboard Interrupt Controller Cascade Serial Port COM B Serial Port COM A Audio Diskette Drive Parallel Port LPT 1 Real Time Clock Available for PCI Available for PCI Available for PCI Mouse Coprocessor Primary IDE Controller Secondary IDE Controller System Function Unused Unused Diskette Drive ECP Parallel Port LPT1 Default Alternate DMA 0 DMA Controller Cascading Unused Unused Unused 6 1 4 ICH Fixed 1 0 Registers Port 00h 02h 04h 06h COh C4h C8h CCh 01h 03h 05h 07h C2h C6h Cah CEh 10h 1Fh 20h 21h 24h 25h 28 29h 2Ch 2Dh 30h 31h 34h 35h 38h 39h 3Ch 3Dh 40h 41h 42h 43h 50h 53h 61h 70h 71h 72h 73h 74h 75h 76h 77h 81h 82h 83h 84h 86h 88h 89h 8Ah 8Bh 8CH 8Eh 8Fh 91h 9Fh except 92h 92h Register Name Channel 0 1 2 3 DMA Base
50. ore installing the heatsink if necessary Reinstalled heatsink Note where the thermal interface is located on the heatsink Carefully remove the thermal interface pad and all residue from the heatsink surface If any thermal interface remains on the die of the processor scrape it off with your fingernail A Q Tip dipped in alcohol can be used to clean both surfaces Add thermal interface pad to the bottom of the heatsink before reinstalling the original heatsink to insure an efficient thermal interface Use Compaq part number 210397 001 thermal interface pad CAUTION Thermal interface heat transmission is reduced if residue remains on the heatsink or processor or the heatsink thermal interface surface is scratched This could lead to the processor running at a higher than normal temperature fan turning at a higher than normal speed and possible loss of data if processor shuts down from overheating Q Ensure that the pins on the processor are properly aligned before inserting the processor in the ZIF socket Two corners of the processor will not have an outermost pin G All units with 866 MHz and faster processors require an active fansink When installing the fan make sure it is positioned so it blows down on the processor a All units with 866 MHz and faster processors require use of a chassis fan Section 4 15 4 30 Removal amp Replacement Procedures 4 15 System Board Q More information on the system board including troub
51. pe pgs 1 2 1 1 1 Front Panel Controls and LEDS eeeeeeneeeneeneeeennneenneeenenn 1 2 11 2 Rear Paneb Connectors aii ertet t ERR stat Eaa EEE SS 1 3 LESS AS A ero tr URP y REO RETE Er RUE 1 4 152 Serial Number Location entr prre EMEND REO REPE ss 1 5 chapter 2 Spare Parts 2D System Unit zen aid ddan dece edens 2 2 2 2 Mass Storage Devices moi e UR E ER e gee athe 2 3 Did SCABIES T r a a a a a a a S 2 4 2 4 Standard Memory and Expansion Boards eee 2 5 2 5 Miscellaneous Plastics Kitas rea ereen p ed ere Ier e pete res 2 6 2 6 Keyboards not illustrated esses nennen enne en nnne enne nennen 2 7 2 7 Miscellaneous Screw Kit not illustrated eene 2 7 2 8 Miscellaneous Parts mot illustrated sess eene enne 2 8 2 9 Shipping Boxes not illustrated siseses seriste eee esenee eae EEs Ee SEa EA Seseo Eiei 2 8 2 10 Documentation and Software not illustrated 2 8 chapter 3 Removal and Replacement Preliminaries 3 1 Electrostatic Discharge Information ssessseeeeeeneenee nennen nennen 3 1 Sells Generating Static doeet RR Uer 3 1 3 1 2 Preventing Electrostatic Damage to Equipment sese 3 2 3 1 3 Personal Grounding Methods and Equipment eseeeee 3 2 3 1 4 Grounding Workstatiofis hee ete iecit dete o iiec ea 3 2 3 1 5 Recommended Materials and Equipment
52. sion slot cover with a screw Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 17 4 11 3 Installing a PCI Expansion Board Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power Switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures 2 Lay the computer down on its large base for greater stability 3 Remove the access panel Section 4 5 4 f you are installing an expansion board for the first time remove the expansion slot cover 4 18 Removal amp Replacement Procedures 5 Hold the board at each end and carefully rock it back and forth while pushing downward until the connectors fit completely and firmly into the expansion slot gt b 6 Secure the board to the chassis with the retaining screw 7 Attach any cables that came with the board Q If installing a NIC board attach the WOL power cable to connector P9 on the system board if applicable 8 Reassemble the computer The computer should automatically recognize the added plug and play board Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 19 4 12 DIMMs System Memory The computer comes with synchronous dynamic random access memory SDRAM dual inline memory modules DIMMs The Intel 815 chipset comes with at least 64 MB of S
53. sis 6 Slide the power supply toward the front of the computer then lift up to remove it from the chassis To replace the power supply reverse the above procedure 4 34 Removal amp Replacement Procedures chapter b CONNECTORS AND JUMPERS This chapter provides connector jumper and switch information for system board jumpers system I O board connectors and hard drives for the Desktop Model 5 1 System Board 5 1 1 Connectors and Jumpers J22 J21 J20 CR29 J40 P216 roo DN d o P12 Ze cur E6 E49 P5 SWSO E29 P21 P20 CR28 PAS CR28 3 3V Aux LED P12 SOS Connector CR29 3 3V Main LED NI P20 Primary IDE Connector E6 Firmware Hub Top Block Lock Installed Bootblock P21 Secondary IDE Connector unprotected Removed Bootblock protected E29 SCSI LED Cable Connector P70 CPU Fan Connector E49 Clear Password Header Installed Enabled P100 ITP Connector NI Removed Cleared J20 22 PCI Slots P701 CD ROM Audio J40 AGP AIMM Connector P216 Chassis Fan Connector P1 Power Supply Connector SW50 Clear CMOS P5 Power Button Front Panel LED Cable Connector XBT1 CMOS Battery P10 Diskette Drive Connector XMM1 2 DIMM Memory Slots P11 Aux Audio Connector XU1 Primary Processor Socket Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 5 1 5 1 2 Clearing CMOS The computer s configuration CMOS may occasionally be corrupted If it does it is necessary to clear the CMOS memory using push button switch SW50 To
54. t damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures Lay the computer down on its large base for greater stability Remove the access panel Section 4 5 Remove the front bezel Section 4 6 Mo w ES Pinch the two tabs of the power button together and pull the button out of the front bezel The spring will follow the button out of the housing TM EM wu A 1l To replace the power button reverse the above procedure Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 7 4 8 Subpanel and Bezel Blanks The subpanel and bezel blanks must be removed from the front bezel if you are installing a mass storage device for the first time WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures Prepare the computer for disassembly Section 4 2 Lay the computer down on its large base for greater stability Remove the access panel Section 4 5 Remove the front bezel Section 4 6 ph soe pa ues Pull on the subpanel to remove it from the inside of the front bezel CAUTION Hold the subpanel straight when you pull it away from the front bezel Pulling at an angle could damage the pins that align the subpanel within the front bezel 6 Gently push on the bez
55. ter provides general service information for the computer Adherence to the procedures and precautions described in this chapter is essential for proper service After completing all necessary removal and replacement procedures run the Diagnostics utility to verify that all components operate properly 4 1 Disassembly Sequence Chart Use the chart below to determine the disassembly sequence for removing components from the computer Feet Installation Cable Lock Access Panel 4 6 Front Bezel 4 7 Power Button Subpanel and Bezel Blanks Power Switch Assembly Removing an Internal 3 5 Inch Hard Drive Removing an External 5 25 Inch Drive Removing an External 3 5 Inch Drive Expansion Boards System Memory Graphics Cards Processor System Board Lithium Battery Chassis Fan Assembly Power Supply Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 1 4 2 4 2 Disassembly Preparation Before adding any internal options or performing a removal replacement 1 Remove any diskette compact disc or tape from the computer 2 Turn off the computer and any peripheral devices that are connected to it A WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures CAUTION Turn off the computer before disconnecting any cables
56. test equipment Removal amp Replacement Preliminaries 3 1 5 3 2 3 2 1 Use fixtures made of static safe materials when fixtures must directly contact dissipative surfaces Keep work area free of nonconductive materials such as ordinary plastic assembly aids and Styrofoam Use field service tools such as cutters screwdrivers and vacuums that are conductive Recommended Materials and Equipment Materials and equipment that are recommended for use in preventing static electricity include Antistatic tape Antistatic smocks aprons or sleeve protectors Conductive bins and other assembly or soldering aids Conductive foam Conductive tabletop workstations with ground cord of one megohm 10 resistance Static dissipative table or floor mats with hard tie to ground Field service kits Static awareness labels Wrist straps and footwear straps providing one megohm 10 resistance Material handling packages Conductive plastic bags Conductive plastic tubes Conductive tote boxes Opaque shielding bags Transparent metallized shielding bags Transparent shielding tubes Routine Care General Cleaning Safety Precautions RA A Never use solvents or flammable solutions to clean the computer Never immerse any parts in water or cleaning solutions apply any liquids to a clean cloth and then use the cloth on the component Always turn off the computer when cleaning with liquids or damp cloths Always turn off
57. uctions to establish new passwords Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 5 3 5 2 Hard Drive Jumper Settings 5 2 1 Seagate Quantum and Western Digital The drawings and tables below apply to a number of different size drives in the following paragraphs 2468 13 57 Seagate Quantum and Western Digital Ultra ATA Hard Drive Jumper Settings Definition Seagate Quantum Western Digital Single 7 8 1 2and3 5 3 5 Primary 5 6and7 8 1 2and3 5 5 6 Secondary No connection 3 5 3 4 Cable Select 5 6 2 4and3 5 1 2 5 4 Connectors and Jumpers 5 2 2 Maxtor Maxtor Ultra ATA Hard Drive Jumper Settings Definition J50 J48 J46 J44 J42 Single J Primary in a dual drive system J Secondary O Cable Select Disabled Enabled O 4092 Cylinder Limitation Disabled Enabled co Factory Reserved O Factory Reserved O Default setting Jumper No jumper J O Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 5 5 chapter 6 SPECIFICATIONS 6 1 6 1 1 Specifications System Dimensions Height Width Depth Weight approximate depending on configuration Power Supply 200 Watt Operating Voltage Range Rated Voltage Range Rated Line Frequency Rated Input Current Maximum Maximum Rated Power Environmental Requirements Temperature Operating Shipping Humidity noncondensing Operating Nonoperating Maximum Altitude unpressurized Operating Nonoperating C
58. ve adapters use silver U S Screws CAUTION When servicing the computer ensure that cables are placed in their proper locations during the reassembly process Improper cable placement can damage the computer CAUTION Use only 3 16 inch or 5 mm long screws as guide screws Longer screws can damage the internal components of the drive Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4 15 4 11 Expansion Boards 4 11 1 Expansion Board Slots O PCI expansion slots O AGP graphics slot 4 16 Removal amp Replacement Procedures 4 11 2 Removing a PCI Expansion Board 1 Prepare the computer for disassembly Section 4 2 WARNING Power is continuous to the system board and power supply even when the power switch is turned off To prevent damage to the unit disconnect the power cord from the power source or the unit before beginning disassembly procedures Lay the computer down on its large base for greater stability Remove the access panel Section 4 5 Disconnect any cables from the expansion board noting their location for reinstallation Remove the expansion board retaining screw QV UA uS S O Hold the board at each end and carefully rock it back and forth while pulling upward until the connectors pull free from the slot Be sure not to scrape the card against other components P 7 Tf not installing another expansion board in the slot then close off the open slot by installing an expan
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