Compaq EXS Series, EX Series manual System Board

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4.15System Board

✎More information on the system board, including troubleshooting 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).

4.Disconnect any cables that are attached to the system board, noting their location for reinstallation.

5.Remove the DIMMs (optional) (Section 4.12).

6.Remove the graphics card (Section 4.13).

7.Remove the six retaining screws that secure the system board to the chassis.

8.Slide the board about ½ 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

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Contents Maintenance & Service Guide Maintenance & Service Guide Maintenance & Service Guide Contents Removal and Replacement Procedures Specifications About this Guide Symbols and ConventionsTechnician Notes Locating Additional Information Chapter Product DescriptionFront Panel Controls and LEDs Computer FeaturesComponent/Function Rear Panel Connectors ComponentReference Drive Bay Configuration Drive PositionsSerial Number Location Spare Parts Spare Part Warranty Description Number Tier System UnitMass Storage Devices Cables Standard, Memory, and Expansion Boards Miscellaneous Plastics Kit Keyboards not illustrated Miscellaneous Screw Kit not illustratedDocumentation and Software not illustrated Miscellaneous Parts not illustratedShipping Boxes not illustrated Description Spare Part NumberGenerating Static Removal & Replacement PreliminariesElectrostatic Discharge Information Relative Humidity Event 55% 40% 10%Grounding Workstations Preventing Electrostatic Damage to EquipmentPersonal Grounding Methods and Equipment Method VoltageRoutine Care General Cleaning Safety PrecautionsRecommended Materials and Equipment Cleaning the Keyboard Cleaning the Computer CaseCleaning the Monitor Power Supply Fan Service ConsiderationsCleaning the Mouse Tools and Software RequirementsLithium Coin Cell Battery Cables and ConnectorsHard Drives Removal and Replacement Procedures Disassembly Sequence ChartDisassembly Preparation Feet Installation Cable Lock Access Panel Front Bezel Power Button Subpanel and Bezel Blanks Power Switch Assembly Drive Positions Using the Cable-Select Feature with Ultra ATA Devices Removing an Internal 3.5-Inch Hard Drive Removing an External 5.25-Inch Drive Removing an External 3.5-Inch Drive Page Expansion Boards Expansion Board SlotsRemoving a PCI Expansion Board Installing a PCI Expansion Board Page System Memory Memory Module InstallationDIMMs Page Graphics Cards Installing a GPA/AIMM Card 24Removal & Replacement Procedures AGP Card with a Type I Retention Mechanism Removing an AGP Card13.3 GPA/AIMM Card with a Type 2 Retention Mechanism AGP Card with a Type 2 Retention Mechanism Standard AGP Expansion Card Processor 30Removal & Replacement Procedures System Board Battery Chassis Fan Assembly Power Supply Connectors and Jumpers Connectors and JumpersClearing Cmos Disabling or Clearing the Power-On and Setup Passwords Seagate, Quantum, and Western Digital Hard Drive Jumper SettingsDefinition Seagate Quantum Western Digital Maxtor Definition J50 J48 J46 J44 J42Specifications SpecificationsSystem Hardware IRQ System Function System InterruptsSystem DMA Hardware DMA System FunctionICH Fixed I/O Registers Port Register NameICH Fixed I/O Registers Port Register Name System Memory Map Size Memory Address System FunctionDrives MB Diskette DriveUltra ATA Hard Drives 10.0 GB 15.0 GBCD-ROM Drives 48X MaxCompaq Keyboard Scroll MouseIntel 3D Graphics Supported Graphics ResolutionsColor Depth Mode Bits/pixel Refresh Rate Hz NVIDIA M64 ProIndex 2Index