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Compaq EP Series manual Disconnecting the Power Switch

Models: EP Series

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4.10Power Switch

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 4.6).

4.Remove the front bezel (Section 4.7).

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.

Disconnecting the Power Switch

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 EP Series of Personal Computers

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Compaq EP Series manual Disconnecting the Power Switch

Contents

Maintenance & Service Guide Compaq Deskpro EP Series of Personal ComputersGuide to Features & Upgrades Compaq Deskpro EP Series of Personal ComputersMaintenance & Service Guide Compaq Deskpro EP Series of Personal ComputersCompaq Computer Corporation preface CONTENTSRemoval and Replacement Preliminaries About This GuideRemoval and Replacement Procedures iv Contentschapter Service Notes Connectors, Jumpers, and SwitchesSpecifications chapterABOUT THIS GUIDE Symbols and Conventionspreface Technician NotesTechnical Reference Guide Compaq Service Quick Reference Guide Locating Additional DocumentationCompaq Service Advisories and Bulletins Compaq QuickFind The following documentation is available to support these productsCompaq Deskpro EP Series of Personal Computers chapterPRODUCT DESCRIPTION Compaq Deskpro EP Series of Personal Computers1.1 Model Overview 1.2 System Design 1.3 Preinstalled Software 1.3.1 Ordering Additional SoftwareOnline Safety & Comfort Guide English only 1.4 Computer Features 1.4.1 Front Panel Controls and LEDs - 440BXComponent/Function 1.4.2 Front Panel Controls and LEDs - Intel 810/810eFront Panel Controls and LEDs - Intel 810/ 810e Component/FunctionComponent 1.4.3 Rear Panel Connectors - 440BXRear Panel Connectors - 440BX ComponentComponent 1.4.4 Rear Panel Connectors - Intel 810/810eRear Panel Connectors - Intel 810/810e ComponentDrive bay numbers are stamped on the chassis 1.4.5 Drive PositionsConfiguration Drive Positions1.5 Serial Number Location Serial Number Locationschapter SPARE PARTSSystem Unit Spare Parts - 440BX Model 2.1 System Unit2.1.1 System Unit - 440BX 2-2 Spare PartsSystem Unit Spare Parts - 440BX Major Differences Between 440BX and Intel 810/810eCompaq Despro EP Series of Personal Computers 2.1.2 System Unit - Intel 810/810e System Unit Spare Parts - Intel 810/810e Model2-4 Spare Parts System Unit Spare Parts - Intel 810/810e Major Differences Between 440BX and Intel 810/810e2.2 Mass Storage Devices Mass Storage Devices2-6 Spare Parts Mass Storage Devices 2.3 Cables Cables2-8 Spare Parts Spare Part Number CablesDescription Cable Kit includes2.4 Standard and Optional Boards Standard and Optional Boards2-10 Spare Parts Standard and Optional Boards Not shownStandard and Optional Boards, continued 2-12 Spare PartsStandard and Optional Boards Continued Compaq Despro EP Series of Personal Computersand thermal interface. Use on 010697-101 system board Compaq PREMIER ∙SOUND board Standard and Optional Boards ContinuedPREMIER ∙SOUND 440BX 2-14 Spare Parts2.5 Keyboards KeyboardsCompaq Despro EP Series of Personal Computers Miscellaneous Hardware Kit 2.6 Miscellaneous Hardware KitMiscellaneous Hardware 2-16 Spare PartsMiscellaneous Plastics Kit 2.7 Miscellaneous Plastics KitMiscellaneous Plastics Kit, Desktop and Minitower Compaq Despro EP Series of Personal ComputersMiscellaneous Parts 2.8 Miscellaneous PartsMiscellaneous Parts 2-18 Spare PartsShipping Boxes not illustrated 2.9 Shipping Boxes2.10 Documentation and Software Documentation and Software not illustrated3.1.2 Cleaning the Computer Case REMOVAL AND REPLACEMENT PRELIMINARIES3.1.1 Cleaning Safety Precautions 3.1 Routine Care3.1.3 Cleaning the Keyboard 3.1.4 Cleaning the Monitor3.1.5 Cleaning the Mouse 3.2 Electrostatic Discharge Information 3.2.1 Generating Static3.2.2 Preventing Electrostatic Damage to Equipment 3.2.5 Recommended Materials and Equipment 3.2.3 Personal Grounding Methods and Equipment3.2.4 Grounding Workstations Static Shielding Protection Levels3.3.1 Tools and Software Requirements 3.3 Service Considerations3.3.3 Cables and Connectors 3.3.2 Screws3.3.4 Hard Drives 3.3.5 Plastic PartsREMOVAL AND REPLACEMENT PROCEDURES 4.1 Disassembly Sequence Chartchapter 4.2 Disassembly Preparation 4.3 Feet Installation Installing the Feet4.4 Logo Plate Replacing the Compaq Logo Plate4.5 Cable Lock To remove the cable lock provision, reverse the above procedure Installing the Cable Lock Provision - Intel 810/810e4-6 Removal and Replacement Procedures 4.6 Access Panel 4.7 Front Bezel Removing the Front Bezel4.8 Power Button Removing the Power Button4.9 Subpanel and Bezel Blanks Removing the Subpanel and Bezel Blanks4.10 Power Switch Disconnecting the Power Switch4.11 Mass Storage Devices Drive PositionsUsing the Cable-Select Feature with Ultra ATA Devices 4.11.1 Removing an Internal 3.5-Inch Hard Drive Disconnecting the CablesUnlocking the Drives 8. Remove the four guide screws from the drive 4.11.2 Removing an External 5.25-Inch Drive Releasing the DrivesRemoving an External 5.25-inch Drive 4.11.3 Removing an External 3.5-Inch Drive 4-18 Removal and Replacement Procedures8. Remove the drive bezel To replace the drive, reverse the previous procedures 4-21 4.12 Removing the DrivelocksDrivelock Mechanism Compaq Deskpro EP Series of Personal Computers4-22 Removal and Replacement Procedures Removing the Drivelock Mechanism11. Remove the spring from the post see inset 4-24 Removal and Replacement Procedures 4.13 Expansion Boards4.13.1 440BX Deskpro EP Expansion Slots - 440BX 2-DIMM ModelDeskpro EP Expansion Slots - Intel 810e 4.13.2 Intel 810 and 810eDeskpro EP Expansion Slots - Intel 4-254.13.3 Removing an Expansion Board Removing the Expansion Board4.13.4 Installing an Expansion Board Removing the Expansion Board Slot Cover6. Secure the board to the chassis with the retaining screw 4.14 Board Guide Removing the Board Guide4.15 System Memory 4.15.1 440BX4.15.2 Intel 810/810e Installing a DIMM Module 4.16 AGP Graphics Board 440BX 4.16.1 AGP Graphics Board Removal 440BX4.16.2 Graphics Memory Upgrade 440BX Installing the Memory Module4.17 Processor Components 4.17.1 ProcessorTo install a new processor, reverse this procedure 4-36 Removal and Replacement Procedures 4.17.2 Processor Guide Rails Removing the Processor RailsReinstall the system board in the computer chassis 4.18 System Board Removing the System Board4.19 Internal Speaker Removing the Speaker From the Side of the Drive Cage4-41 To install the new speaker, reverse the preceding stepsRemoving the Speaker From the Rear of the Chassis Compaq Deskpro EP Series of Personal Computers4.20 Lithium Battery Locating the Battery on the System Board - 440BX4-43 Locating the Battery on the System Board - IntelLocating the Battery on the System Board - Intel 810e Compaq Deskpro EP Series of Personal Computers5. Lift the battery out of the holder 4.21 Fan Assembly Removing the Fan4.22 Power Supply Removing the Power Supply - 440BX4-47 To replace the power supply, reverse the above procedureRemoving the Power Supply - Intel 810/810e Compaq Deskpro EP Series of Personal Computers4.23 Converting a Desktop to a Minitower Activating the Drivelocks Shown from the Rear of the ChassisInstalling a Drive in the Minitower Configuration 7. Reconnect the power, signal, and audio cables to the drives 4.24 Converting a Minitower to a Desktop Installing a Drive in the Desktop Configuration 4-52 Removal and Replacement Procedures8. Reconnect the power, signal, and audio cables to the drives Connectors, Jumpers, and Switches - 440BX Three-DIMM Board CONNECTORS, JUMPERS, AND SWITCHES5.1.1 Connectors, Jumpers, and Switches 5.1 System Board5-2 Connectors, Jumpers, and Switches Connectors, Jumpers, and Switches - 440BX Two-DIMM BoardConnectors, Jumpers, and Switches - Intel 810e PCA=010697-101 System Board Overview - 440BX Two-DIMM BoardSystem Board Overview - Intel 810e Two-DIMM Board Connectors, Jumpers, and Switches - Intel 810/810e Two-DIMM BoardSystem Board Overview - Intel 810 Two-DIMM Board Description5.1.2 Switches Switch SW1 Settings 440BX5.1.3 Jumpers 440BX E50 Jumper LocationDisabling or Clearing the Power-On and Setup Passwords 440BX Clearing Configuration Memory CMOS 440BX5-6 Connectors, Jumpers, and Switches 5.1.4 Jumpers Intel 810/810e E49 Jumper LocationDisabling or Clearing the Power-On and Setup Passwords Intel 810/810e 5-8 Connectors, Jumpers, and SwitchesClearing Configuration Memory CMOS - Intel 810/810e CMOS Button SW50 Location5.2.1 Using the Cable-Select Feature with Ultra ATA Devices 5.2 Hard DrivesSeagate 5.2.2 Drive Jumper SettingsDefinition Fujitsu5-12 Connectors, Jumpers, and Switches Maxtor Ultra ATA Hard Drive Jumper SettingsMaxtor Ultra ATA Hard Drive Jumper Settings DefinitionSystem SPECIFICATIONS6.1 Specifications 6.1.16-2 Specifications Interrupts6.1.2 Hardware IRQSystem Function Shipping Configuration 6.1.4 I/O6.1.3 Hardware DMAI/O Address Hex System Function Shipping Configuration6-4 Specifications I/O Continued1.44-MB Diskette Drive 6.2 Drives6.1.5 Memory Map 6.2.1Ultra ATA Hard Drives 6.2.26-6 Specifications 3.2-GB6.2.3 CD-ROM Drives 24X Max32X Max 6-8 Specifications CD-ROM continued40X Max 6.4 2-Button Mouse 6.5 Supported Graphics Resolutions6.3 Compaq Enhanced Keyboard 6.5.1 ATI RAGE PRO TURBO 1X AGP6.5.4 Matrox MGA G100 AGP 6.5.2 ATI RAGE PRO IIC AGP6.5.3 NVIDIA RIVA 128 AGP 6-10 Specifications6.5.5 Matrox Millenium G200-SD AGP 6.5.6 Matrox Millenium G400-SG AGP6.5.7 Integrated Intel 3D Graphics 6.6 Audio Controllers 6-12 Specifications440BX440BX Intel 810/810e 6-13SERVICE NOTES chapterIndex Page Ultra ATA devices, 4-13 Ultra ATA hard drive specifications system design, 1-3 specifications system boardtools service considerations Western Digital EIDE hard drive jumper settings181099-001 134011-004