Compaq EXS Series, EX Series Service Considerations, Cleaning the Mouse, Power Supply Fan, Screws

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3.2.5Cleaning the Mouse

Before cleaning the mouse, ensure that the power to the computer is turned off.

!Clean the mouse ball by first removing 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.

!To clean the mouse body, follow the procedures in 3.2.2.

3.3Service Considerations

Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer.

3.3.1Power 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.

3.3.2Tools and Software Requirements

To service the computer, you need the following:

!Torx T-15 screwdriver (Compaq screwdriver with bits PN 161946-001)

!Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)

!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)

3.3.3Screws

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, 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

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Contents Maintenance & Service Guide Maintenance & Service Guide Maintenance & Service Guide Contents Removal and Replacement Procedures Specifications Technician Notes Symbols and ConventionsAbout this Guide Locating Additional Information Chapter Product DescriptionComponent/Function Computer FeaturesFront Panel Controls and LEDs 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 VoltageRecommended Materials and Equipment General Cleaning Safety PrecautionsRoutine Care Cleaning the Monitor Cleaning the Computer CaseCleaning the Keyboard Power Supply Fan Service ConsiderationsCleaning the Mouse Tools and Software RequirementsHard Drives Cables and ConnectorsLithium Coin Cell Battery 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 DIMMs Memory Module InstallationSystem Memory 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 Definition Seagate Quantum Western Digital Hard Drive Jumper SettingsSeagate, Quantum, and Western Digital Maxtor Definition J50 J48 J46 J44 J42System SpecificationsSpecifications 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