Compaq EX Series, EXS Series manual About this Guide, Symbols and Conventions, Technician Notes

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preface

ABOUT THIS GUIDE

This Maintenance & 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. 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:

!	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

	!	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.

	!	WARNING: To reduce the risk of electric shock or damage to the equipment:
	!	•	Do not disable the power grounding plug. The grounding plug is an important safety feature.
		•
		•	Plug the power cord into a grounded (earthed) electrical outlet that is easily accessible at all
			times.
		•	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

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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 Product Description ChapterFront Panel Controls and LEDs Computer FeaturesComponent/Function Component Rear Panel ConnectorsDrive Positions Reference Drive Bay ConfigurationSerial Number Location Spare Parts System Unit Spare Part Warranty Description Number TierMass Storage Devices Cables Standard, Memory, and Expansion Boards Miscellaneous Plastics Kit Miscellaneous Screw Kit not illustrated Keyboards not illustratedDescription Spare Part Number Miscellaneous Parts not illustratedShipping Boxes not illustrated Documentation and Software not illustratedRelative Humidity Event 55% 40% 10% Removal & Replacement PreliminariesElectrostatic Discharge Information Generating StaticMethod Voltage Preventing Electrostatic Damage to EquipmentPersonal Grounding Methods and Equipment Grounding WorkstationsRoutine Care General Cleaning Safety PrecautionsRecommended Materials and Equipment Cleaning the Keyboard Cleaning the Computer CaseCleaning the Monitor Tools and Software Requirements Service ConsiderationsCleaning the Mouse Power Supply FanLithium Coin Cell Battery Cables and ConnectorsHard Drives Disassembly Sequence Chart Removal and Replacement ProceduresDisassembly 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 Board Slots Expansion BoardsRemoving 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 Removing an AGP Card AGP Card with a Type I Retention Mechanism13.3 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 Definition J50 J48 J46 J44 J42 MaxtorSpecifications SpecificationsSystem Hardware DMA System Function System InterruptsSystem DMA Hardware IRQ System FunctionPort Register Name ICH Fixed I/O RegistersICH Fixed I/O Registers Port Register Name Size Memory Address System Function System Memory MapMB Diskette Drive Drives10.0 GB 15.0 GB Ultra ATA Hard Drives48X Max CD-ROM DrivesScroll Mouse Compaq KeyboardNVIDIA M64 Pro Supported Graphics ResolutionsColor Depth Mode Bits/pixel Refresh Rate Hz Intel 3D GraphicsIndex 2Index