Compaq EXS Series, EX Series manual Power Switch Assembly

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4.9Power 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.

2.Lay the computer down on its large base for greater stability.

3.Remove the access panel (Section 4.5).

4.Remove the front bezel (Section 4.6).

5.Disconnect the power/LED cable from the system board 1.

6.Push the release tab 2 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

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Contents Maintenance & Service Guide Maintenance & Service Guide Maintenance & Service Guide Contents Removal and Replacement Procedures Specifications Symbols and Conventions About this GuideTechnician Notes Locating Additional Information Chapter Product DescriptionComputer Features Front Panel Controls and LEDsComponent/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 illustratedMiscellaneous Parts not illustrated Shipping Boxes not illustratedDocumentation and Software not illustrated Description Spare Part NumberRemoval & Replacement Preliminaries Electrostatic Discharge InformationGenerating Static Relative Humidity Event 55% 40% 10%Preventing Electrostatic Damage to Equipment Personal Grounding Methods and EquipmentGrounding Workstations Method VoltageGeneral Cleaning Safety Precautions Routine CareRecommended Materials and Equipment Cleaning the Computer Case Cleaning the KeyboardCleaning the Monitor Service Considerations Cleaning the MousePower Supply Fan Tools and Software RequirementsCables and Connectors Lithium Coin Cell BatteryHard 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 Memory Module Installation System MemoryDIMMs 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 Hard Drive Jumper Settings Seagate, Quantum, and Western DigitalDefinition Seagate Quantum Western Digital Maxtor Definition J50 J48 J46 J44 J42Specifications SpecificationsSystem System Interrupts System DMAHardware IRQ System Function 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 MouseSupported Graphics Resolutions Color Depth Mode Bits/pixel Refresh Rate HzIntel 3D Graphics NVIDIA M64 ProIndex 2Index