Compaq EP Series Maintenance & Service Manual
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Compaq EP Series Maintenance & Service Manual

Compaq EP Series Maintenance & Service Manual

Compaq personal computer maintenance & service guide
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Maintenance &
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Compaq Deskpro EP Series
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  • Page 1 Maintenance & Service Guide Compaq Deskpro EP Series of Personal Computers...
  • Page 2 Guide to Features & Upgrades Compaq Deskpro EP Series of Personal Computers...
  • Page 3 2000 Compaq Computer Corporation. All rights reserved. Printed in the U.S.A. Compaq, the Compaq logo, and Deskpro Registered U. S. Patent and Trademark Office. PREMIER • SOUND is a trademark of Compaq Computer Corporation. Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft Corporation.

  • Page 4: Table Of Contents

    preface About This Guide Symbols and Conventions ... vii Technician Notes ... vii Locating Additional Documentation ... viii chapter 1 Product Description 1.1 Model Overview ... 1-2 1.2 System Design... 1-3 1.3 Preinstalled Software ... 1-4 1.3.1 Ordering Additional Software ... 1-4 1.4 Computer Features ...
  • Page 5 3.2 Electrostatic Discharge Information... 3-3 3.2.1 Generating Static ... 3-3 3.2.2 Preventing Electrostatic Damage to Equipment ... 3-3 3.2.3 Personal Grounding Methods and Equipment... 3-4 3.2.4 Grounding Workstations... 3-4 3.2.5 Recommended Materials and Equipment... 3-4 3.3 Service Considerations... 3-5 3.3.1 Tools and Software Requirements...
  • Page 6 1.44-MB Diskette Drive ... 6-5 6.2.2 Ultra ATA Hard Drives ... 6-6 6.2.3 CD-ROM Drives... 6-7 6.3 Compaq Enhanced Keyboard... 6-9 6.4 2-Button Mouse... 6-9 6.5 Supported Graphics Resolutions ... 6-9 6.5.1 ATI RAGE PRO TURBO 1X AGP... 6-9 6.5.2 ATI RAGE PRO IIC AGP...

  • Page 7: About This Guide

    UIDE This Maintenance & Service Guide is a troubleshooting and repair guide that can be used for reference when servicing the Compaq Deskpro EP Series of Personal Computers. Only authorized technicians trained by Compaq should attempt to repair this equipment.

  • Page 8: Locating Additional Documentation

    Locating Additional Documentation The following documentation is available to support these products: User Documentation Technical Training Guides Compaq Service Advisories and Bulletins Compaq QuickFind Technical Reference Guide Compaq Service Quick Reference Guide viii About This Guide...

  • Page 9: Product Description

    RODUCT ESCRIPTION This chapter describes the model offerings and features of Compaq Deskpro EP Series of Personal Computers. Compaq Deskpro EP Series of Personal Computers Compaq Deskpro EP Series of Personal Computers...

  • Page 10: Model Overview

    The Compaq Deskpro EP Series, Intel 440BX chipset models will be referred to in this MSG as 440BX. The Compaq Deskpro EP Series, Intel 810 chipset models will be referred to in this MSG as 810 or Intel 810. The Compaq Deskpro EP Series, Intel 810e chipset models will be referred to in this MSG as 810e or Intel 810e.

  • Page 11: System Design

    System Design Desktop models of the Compaq Deskpro EP Series of Personal Computers use an innovative chassis to house the removable system board, expansion boards, power supply, and mass storage devices. Internal components are accessible when the access panel is removed.

  • Page 12: Preinstalled Software

    A yearly subscription that delivers up to 12 monthly CD-ROMs. The annual subscription provides continuous access to the latest developments. ✎ When calling Compaq to place an order, be sure to have the serial number of the computer available. This number is necessary for all purchases. Product Description...

  • Page 13: Computer Features

    Computer Features Compaq Deskpro EP Series of Personal Computers ship with a mouse and keyboard. Some models are also equipped with a CD-ROM drive. A Compaq color monitor or other compatible monitor does not ship with the computer. 1.4.1 Front Panel Controls and LEDs - 440BX...

  • Page 14: Front Panel Controls And Leds - Intel 810/810E

    1.4.2 Front Panel Controls and LEDs - Intel 810/810e Front Panel Controls and LEDs - Intel 810/ 810e Product Description...

  • Page 15: Rear Panel Connectors - 440Bx

    1.4.3 Rear Panel Connectors - 440BX Rear Panel Connectors - 440BX < Compaq Deskpro EP Series of Personal Computers...

  • Page 16: Rear Panel Connectors - Intel 810/810E

    1.4.4 Rear Panel Connectors - Intel 810/810e Rear Panel Connectors - Intel 810/810e Product Description <...

  • Page 17: Drive Positions

    Drive Positions 1, 2 4, 5 ✎ Drive bay numbers are stamped on the chassis. To verify the type and size of the mass storage devices installed in the computer, run Compaq Computer Setup. Compaq Deskpro EP Series of Personal Computers...

  • Page 18: Serial Number Location

    EEPROM on the system board and may be accessed through Diagnostics for Windows. ✎ If the system board is replaced with a spare part from Compaq, the invalid serial number condition will be recognized during POST. The original serial number must then be reentered through Computer Setup.

  • Page 19: Spare Parts

    The Compaq Deskpro EP Series, Intel 440BX chipset models will be referred to in this MSG as 440BX. The Compaq Deskpro EP Series, Intel 810 chipset models will be referred to in this MSG as 810 or Intel 810. The Compaq Deskpro EP Series, Intel 810e chipset models will be referred to in this MSG as 810e or Intel 810e.

  • Page 20: System Unit

    System Unit 2.1.1 System Unit - 440BX System Unit Spare Parts - 440BX Model Spare Parts...
  • Page 21 166814-001 166867-001 166880-001 166814-001 166867-001 166880-001 166814-001 166867-001 166880-001 166814-001 166867-001 166880-001 103748-001 137384-001 Not spared 103748-001 137384-001 Not spared 137384-001 Not spared Compaq Despro EP Series of Personal Computers Diskette Drive Cable 166838-001 166838-001 166838-001 166838-001 143218-001 143218-001 143218-001...

  • Page 22: System Unit - Intel 810/810E

    2.1.2 System Unit - Intel 810/810e System Unit Spare Parts - Intel 810/810e Model Spare Parts...
  • Page 23 166814-001 166867-001 166880-001 166814-001 166867-001 166880-001 166814-001 166867-001 166880-001 166814-001 166867-001 166880-001 103748-001 137384-001 Not spared 103748-001 137384-001 Not spared 137384-001 Not spared Compaq Despro EP Series of Personal Computers Diskette Drive Cable 166838-001 166838-001 166838-001 166838-001 143218-001 143218-001 143218-001...

  • Page 24: Mass Storage Devices

    Mass Storage Devices Mass Storage Devices Spare Parts...
  • Page 25 33MB/sec. Spare Part Number 332861-001 332866-001 327646-001 134197-001 166872-001 166973-001 134198-001 320662-001 135364-001 134193-001 140515-001 120419-001 120420-001 388511-001 179161-001 180808-001 166869-001 327659-001 400807-001 120696-001 134195-001 134196-001 Compaq Despro EP Series of Personal Computers...

  • Page 26: Cables

    Cables Cables Spare Parts...
  • Page 27 (440BX and 810e PCA=010697-101 only) (3 ea.) Audio cable, 25”. Use with Creative Labs SoundBlaster PCI 128V Audio Board. Video cable for P1610W color monitor *Not shown Cables Spare Part Number 166879-001 166879-002 278296-001 142766-001 166974-001 166925-001 149806-001 305717-001 Compaq Despro EP Series of Personal Computers...

  • Page 28: Standard And Optional Boards

    Standard and Optional Boards Standard and Optional Boards 2-10 Spare Parts...
  • Page 29 Standard and Optional Boards Description 1a PII System board, three-DIMM model (440BX) (PCA=009635-101). 1b PII System board, two-DIMM model (440BX) (PCA=008312-101). PII/PIII System board, three-DIMM model (440BX) (PCA=010233-101) Shipped on all PII and PIII units after 2/23/99). 1c Intel 810 System Board (PCA=010174-101). Intel 810e System Board (PCA=010546-101).
  • Page 30 Standard and Optional Boards, continued 2-12 Spare Parts...
  • Page 31 Memory Module, DIMM, 100 MHz with ECC 16-MB 32-MB 64-MB 128-MB Spare Part Number 164402-001 133840-001 176743-001 164403-001 176744-001 155592-001 164568-001 161671-001 164568-001 278066-001 278067-001 278095-001 278097-001 288440-001 278098-001 278099-001 166969-001 166890-001 179190-001 166966-001 166964-001 166968-001 166967-001 166965-001 Compaq Despro EP Series of Personal Computers 2-13...
  • Page 32 Shipped on 440BX units with Windows 98 or Windows NT 4.0 and PIII 650/100 and 700/100 starting 11/15/99 PIII 500-MHz and greater starting 11/17/99 Compaq 10/100 TX PCI Intel WOL UTP w/Remote Wakeup cable 3-COM PCI, 10/100 WOL Compaq PREMIER SOUND board...

  • Page 33: Keyboards

    Spare Part Number 269513-171 269513-181 269513-201 269513-B41 269513-221 269513-081 269513-351 269513-051 269513-121 269513-041 269513-151 269513-211 269513-061 269513-191 269513-AD1 269513-B31 166984-161 269513-091 269513-241 269513-131 269513-251 269513-231 269513-071 269513-101 269513-111 269513-AB1 269513-281 269513-141 269513-031 166984-001 Compaq Despro EP Series of Personal Computers 2-15...

  • Page 34: Miscellaneous Hardware Kit

    Miscellaneous Hardware Kit Miscellaneous Hardware Kit Description Miscellaneous hardware kit. Includes: 1 Cover, slot (5 ea.) (101144-001) 2a I/O Panel for 440BX (166802-002) 2b I/O Panel for Intel 810/810e (123556-001) I/O Panel for Intel 810e – PCA=010697-101 (166808-002) 3 Fan guard (105427-003) 4 Screw, 6/32 pan head x 1/4 inch (4 ea.) (192308-001) 5 Thumbscrew (2 ea.) (440BX) (197436-001) * Thumbscrew (2 ea.) (Intel 810/810e) (124702-001)

  • Page 35: Miscellaneous Plastics Kit

    7 Button, power (166774-001) 8 Spring, power button (166837-001) 9 Drivelock, DT (166779-001) 10 Drivelock, MT (166780-001) 11 Springs, drivelock (2 ea.) (166837-002) 12 Board guide (166778-001) *Not shown Spare Part Number 166878-001 Compaq Despro EP Series of Personal Computers 2-17...

  • Page 36: Miscellaneous Parts

    Miscellaneous Parts Miscellaneous Parts 1 Two-button mouse Compaq Intellimouse 2 Cable lock bracket 3 Battery (440BX) Battery (Intel 810) (for use on system board 401963-001) 4 Fan assembly with four plastic pins (for use on Pentium II units 450/100 and above and all Pentium III units 450/100 and above)

  • Page 37: Shipping Boxes

    Maintenance & Service Guide (desktop & minitower) Deskpro Service Reference Guide Windows 98 Country Kit Windows 95 Country Kit Windows NT Country Kit Shipping Boxes (not illustrated) Compaq Despro EP Series of Personal Computers Spare Part Number 166990-001 166990-002 Spare Part Number 180999-001...

  • Page 38: Removal And Replacement Preliminaries

    After cleaning, always wipe the unit with a clean, lint-free cloth. Occasionally, clean the air vents on the computer. Lint and other foreign matter can block the vents and limit the airflow. RELIMINARIES Compaq Deskpro EP Series of Personal Computers...

  • Page 39: Cleaning The Keyboard

    3.1.3 Cleaning the Keyboard Follow all safety precautions in Section 3.1.1 before cleaning the keyboard. To clean the tops of the keys or the keyboard body, follow the procedures described in Section 3.1.2. When cleaning debris from under the keys, review all rules in Section 3.1.1 before following these procedures: CAUTION: Use safety glasses equipped with side shields before attempting to clean debris from under the keys.

  • Page 40: Electrostatic Discharge Information

    Place items on a grounded surface before removing them from their container. Always be properly grounded when touching a sensitive component or assembly. Avoid contact with pins, leads, or circuitry. Place reusable electrostatic-sensitive parts from assemblies in protective packaging or conductive foam. Compaq Deskpro EP Series of Personal Computers...

  • Page 41: Personal Grounding Methods And Equipment

    3.2.3 Personal Grounding Methods and Equipment Use the following equipment to prevent static electricity damage to equipment: Wrist straps are flexible straps with a minimum of one-megohm +/- 10% resistance in the ground cords. To provide proper ground, a strap must be worn snug against bare skin.

  • Page 42: Service Considerations

    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.

  • Page 43: Hard Drives

    Handle hard drives as delicate precision components, avoiding all physical shock and vibration. This applies to failed drives as well as replacement spares. Use only the packaging provided by Compaq for shipping. Do not remove hard drives from the shipping package for storage. Keep hard drives in their protective packaging until they are actually mounted in the CPU.

  • Page 44: Removal And Replacement Procedures

    After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components operate properly. Disassembly Sequence Chart Use the chart below to determine the disassembly sequence for removing components from the computer. ROCEDURES Compaq Deskpro EP Series of Personal Computers...

  • Page 45: Disassembly Preparation

    The Compaq Deskpro EP Series, Intel 440BX chipset models will be referred to in this MSG as 440BX. The Compaq Deskpro EP Series, Intel 810 chipset models will be referred to in this MSG as 810 or Intel 810. The Compaq Deskpro EP Series, Intel 810e chipset models will be referred to in this MSG as 810e or Intel 810e.

  • Page 46: Feet Installation

    Remove the feet from the backing before installation. If necessary, remove the old feet and remove any adhesive residue from the chassis by rubbing with your finger or a dry cloth. Installing the Feet Compaq Deskpro EP Series of Personal Computers...

  • Page 47: Logo Plate

    To install a new logo plate, align the guide pins in the slots 1, then press into place. ✎ When replacing the logo plate, ensure that the alignment pins are properly placed in the front bezel before pressing the logo plate into position. Replacing the Compaq Logo Plate Removal and Replacement Procedures...

  • Page 48: Cable Lock

    Install a cable lock (not provided) to inhibit access to the interior of the computer and secure the computer to a fixed object. Installing the Cable Lock Provision - 440BX Compaq Deskpro EP Series of Personal Computers...
  • Page 49 Installing the Cable Lock Provision - Intel 810/810e To remove the cable lock provision, reverse the above procedure. Removal and Replacement Procedures...

  • Page 50: Access Panel

    4. Slide the access panel backward approximately 1-inch (2.5-cm); then lift it up and off the unit. Removing the Access Panel - 440BX Removing the Access Panel - Intel 810/810e To replace the access panel, reverse the previous steps. Compaq Deskpro EP Series of Personal Computers...

  • Page 51: Front Bezel

    Front Bezel 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.

  • Page 52: Power Button

    5. Pinch the two tabs of the power button together and pull the button out of the front bezel. The spring will follow the button out of the housing. Removing the Power Button To replace the power button, reverse the above procedure. Compaq Deskpro EP Series of Personal Computers...

  • Page 53: Subpanel And Bezel Blanks

    Subpanel and Bezel Blanks The subpanel and bezel blanks must be removed from the front bezel if you are installing a mass storage device for the first time, or if you are converting the unit from a desktop to a minitower configuration or from a minitower to a desktop configuration. WARNING: Power is continuous to the system board and power supply even when the power switch is turned off.

  • Page 54: Power Switch

    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...

  • Page 55: Mass Storage Devices

    4.11 Mass Storage Devices The Compaq Deskpro EP Series of Personal Computers support up to five drives in various configurations. Drive Bay Locations ✎ Drive bay numbers are stamped on the chassis. To verify the type and size of the mass storage devices installed in the computer, run Computer Setup.
  • Page 56 Compaq-supplied metric screws are black. Using the Cable-Select Feature with Ultra ATA Devices Optional drives are available from Compaq in kits that include a special drive cable. The configuration of the drives employs a cable-select feature that identifies the drives as device 0 (primary drive) or device 1 (secondary drive).

  • Page 57: Removing An Internal 3.5-Inch Hard Drive

    4.11.1 Removing an Internal 3.5-Inch Hard Drive 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.
  • Page 58 When installing a second ATA hard drive on the primary controller, you must use an 80-conductor ATA cable for optimal performance. The system automatically recognizes hard drives sold by Compaq (or any other plug and play hard drive) and will automatically reconfigure the computer. If you installed a third- party hard drive, or one that is not a plug and play device, you must run Computer Setup to reconfigure the computer.

  • Page 59: Removing An External 5.25-Inch Drive

    4.11.2 Removing an External 5.25-Inch Drive 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.
  • Page 60 4. Remove the bezel blank from the subpanel, if necessary (Section 4.9). 5. Reinstall the subpanel and the front bezel. The system automatically recognizes hard drives sold by Compaq (or any other plug and play hard drive) and will automatically reconfigure the computer. If you installed a third- party hard drive, or one that is not a plug and play device, you must run Computer Setup to reconfigure the computer.

  • Page 61: Removing An External 3.5-Inch Drive

    4.11.3 Removing an External 3.5-Inch Drive If you are installing a second 3.5-inch diskette drive into 5.25-inch bays #1 or 2 for the first time, you must use a special adapter bracket (spare part number 243230-002). If you are installing a 3.5-inch diskette drive into 5.25-inch bay #3, you must use a special adapter bracket (spare part number 2166923-001).
  • Page 62 11. Remove the guide screw from the right side of the drive. Removing a 3.5-inch Drive from the 5.25-inch Drive Adapter Compaq Deskpro EP Series of Personal Computers...
  • Page 63 To replace the drive, reverse the previous procedures. ✎ The primary 3.5-inch diskette drive should only be installed into bay 3. Bay 3 is the bottom bay in the minitower and the topmost bay in the desktop configuration. When replacing the drive, use the existing screws. Metric screws (M3) have a black finish while U.S.

  • Page 64: Removing The Drivelocks

    The computer chassis contains two drivelock mechanisms. Drivelock 1 secures the external drives in the desktop configuration, drivelock 2 secures all drives in the minitower and the internal drives in the desktop configuration. Drivelock Mechanism Compaq Deskpro EP Series of Personal Computers...
  • Page 65 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.
  • Page 66 2. Place the washer on the middle tab on the underside of the drivelock. 3. Compress the spring, then lower the drivelock onto the drive cage until it snaps into place. Reinstalling the Drivelocks Compaq Deskpro EP Series of Personal Computers...

  • Page 67: Expansion Boards

    4.13 Expansion Boards 4.13.1 440BX Deskpro EP Expansion Slots - 440BX (2-DIMM Model) Deskpro EP Expansion Slots - 440BX (3-DIMM Model) 4-24 Removal and Replacement Procedures...

  • Page 68: Intel 810 And 810E

    4.13.2 Intel 810 and 810e Deskpro EP Expansion Slots - Intel 810 Deskpro EP Expansion Slots - Intel 810e ✎ Your 810e system board may differ from the one shown. Compaq Deskpro EP Series of Personal Computers...

  • Page 69: Removing An Expansion Board

    4.13.3 Removing an Expansion Board 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.

  • Page 70: Installing An Expansion Board

    2. Lay the computer down on its large base for greater stability. 3. Remove the access panel (Section 4.6). 4. If you are installing an expansion board for the first time, remove the expansion slot cover. Removing the Expansion Board Slot Cover Compaq Deskpro EP Series of Personal Computers...
  • Page 71 5. Hold the board at each end and carefully rock it back and forth while pushing downward, until the connectors fit completely and firmly into the expansion slot. Installing an Expansion Board 6. Secure the board to the chassis with the retaining screw. 7.

  • Page 72: Board Guide

    5. Push down on the two tabs on the top of the board guide. 6. While holding the tabs down, remove the guide from the chassis. Removing the Board Guide To replace the board guide, reverse the above procedures. Compaq Deskpro EP Series of Personal Computers...

  • Page 73: System Memory

    SDRAM DIMMs. If your system processor has a bus speed of 66 MHz, Compaq recommends that any additional DIMMs also be 66 MHz. If the system bus speed is 100 MHz, the use of 100-MHz DIMMs is required. (Run Compaq Computer Setup to determine your system bus speed;...
  • Page 74 ✎ When a memory module has been removed, moved, or added, Memory Change Alerts, a feature of Intelligent Manageability, alerts the system administrator and end user. The system automatically recognizes the added memory. Compaq Deskpro EP Series of Personal Computers...

  • Page 75: Agp Graphics Board (440Bx)

    4.16 AGP Graphics Board (440BX) 4.16.1 AGP Graphics Board Removal (440BX) 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.

  • Page 76: Graphics Memory Upgrade (440Bx)

    1, then pivot the module until it latches into position 2. Installing the Memory Module 5. Replace the access panel. 6. Reassemble the computer. 7. Customize the monitor display through the Control Panel. Compaq Deskpro EP Series of Personal Computers...

  • Page 77: Processor Components

    4.17 Processor Components 4.17.1 Processor 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.
  • Page 78 8. Release the original processor from the socket by pulling the handle on the ZIF socket 3 out and upward. 9. Lift the processor 4 out of the socket. Removing the Celeron Processor from the System Board - Intel 810 Compaq Deskpro EP Series of Personal Computers...
  • Page 79 To install a new processor, reverse this procedure. ✎ If the heatsink has a thermal pad attached to its bottom, peel off the protective paper before installing the heatsink. If the heatsink does not have a thermal pad attached to its bottom, apply a single swipe of the thermal crayon to the processor before installing the heatsink.

  • Page 80: Processor Guide Rails

    6. Turn the system board over so the bottom side is up, then use a short, small diameter screwdriver to press the push-pins out of the plastic Tufloks that secure the processor rails to the system board. Removing the Processor Rails Compaq Deskpro EP Series of Personal Computers...
  • Page 81 7. With the Tuflok pins in their full up position, firmly pull on each leg of the processor rail to disengage it from the system board. 8. Place each of the type 2 processor rail goalposts (Compaq part number 350767-002) in position with the open end facing the processor socket and push firmly down to fully seat the free end of each Tuflok in its hole.

  • Page 82: System Board

    1 nearest the power supply to properly align the board in the chassis. ✎ The system board is not spared with the processor board guide rails installed. Remove the guide rails from the existing board and install them on the new system board. Compaq Deskpro EP Series of Personal Computers...

  • Page 83: Internal Speaker

    4.19 Internal Speaker 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.
  • Page 84 6. If an oval speaker is used on the computer, remove the four screws 2 that secure the speaker 3 to the rear of the chassis. Removing the Speaker From the Rear of the Chassis To install the new speaker, reverse the preceding steps. Compaq Deskpro EP Series of Personal Computers...

  • Page 85: Lithium Battery

    4.20 Lithium Battery 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.
  • Page 86 Locating the Battery on the System Board - Intel 810 Locating the Battery on the System Board - Intel 810e Compaq Deskpro EP Series of Personal Computers...
  • Page 87 9. Reassemble the computer. 10. Reconnect the AC power cord and turn on the computer. 11. Reset the date and time, your passwords, and any special system setups, using Compaq Computer Setup. WARNING: This computer contains a lithium-ion battery pack. There is a risk of fire and chemical burn if the battery pack is handled improperly.

  • Page 88: Fan Assembly

    7. Pull on the two push-pins that secure the fan grill to remove it from the fan. Removing the Fan To install the fan assembly, reverse the above procedure. ✎ Use the fan on Pentium II units 450/100 and above and on Pentium III units 450/100 and above. Compaq Deskpro EP Series of Personal Computers...

  • Page 89: Power Supply

    4.22 Power Supply 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.
  • Page 90 Removing the Power Supply - Intel 810/810e To replace the power supply, reverse the above procedure. Compaq Deskpro EP Series of Personal Computers...

  • Page 91: Converting A Desktop To A Minitower

    4.23 Converting a Desktop to a Minitower 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.
  • Page 92 The diskette drive should always be placed in bay number 3, the bay nearest the internal 3.5-inch drives, for proper placement within the chassis. Installing a Drive in the Minitower Configuration CAUTION: The use of unnecessary force may result in damage to the drives. Compaq Deskpro EP Series of Personal Computers...
  • Page 93 7. Reconnect the power, signal, and audio cables to the drives. 8. Remove the subpanel and rotate the bezel blanks 90 degrees (Section 4.9). CAUTION: Hold the subpanel straight when you pull it away from the front bezel. Pulling the subpanel away at an angle could damage the pins that align it within the front bezel.

  • Page 94: Converting A Minitower To A Desktop

    5. Disconnect all power and data cables from the drives in the 5.25-inch drive bays. 6. Remove the drives from the 5.25-inch drive bays by pressing drivelock 2 (Sections 4.11.2 and 4.11.3). Activating the Drivelocks (Shown from the Rear of the Chassis) Compaq Deskpro EP Series of Personal Computers...
  • Page 95 7. Rotate the drives 90 degrees, then reinstall them into the drive bays. ✎ The diskette drive should always be placed in the bay nearest the top of the chassis in the desktop configuration for proper drive clearance and access. Installing a Drive in the Desktop Configuration CAUTION: The use of unnecessary force may result in damage to the drives.
  • Page 96 Converting a Minitower 2 to a Desktop 1 10. Replace the subpanel, front bezel, and the computer access panel. Reassemble the computer. Compaq Deskpro EP Series of Personal Computers...

  • Page 97: Connectors, Jumpers, And Switches

    ONNECTORS UMPERS System Board 5.1.1 Connectors, Jumpers, and Switches System Board Overview - 440BX (Three-DIMM Board) Connectors, Jumpers, and Switches - 440BX (Three-DIMM Board) WITCHES Compaq Despro EP Series of Personal Computers...
  • Page 98 System Board Overview - 440BX (Two-DIMM Board) Connectors, Jumpers, and Switches - 440BX (Two-DIMM Board) Connectors, Jumpers, and Switches - Intel 810e (PCA=010697-101)* Connectors, Jumpers, and Switches...
  • Page 99 System Board Overview - Intel 810 (Two-DIMM Board) System Board Overview - Intel 810e (Two-DIMM Board) Connectors, Jumpers, and Switches - Intel 810/810e (Two-DIMM Board) Compaq Despro EP Series of Personal Computers...

  • Page 100: Switches

    5.1.2 Switches Location of SW1 DIP Switches on the System Board - 440BX ✎ As of January 1, 1999, all 300-MHz and faster Celeron and Pentium processors are shipped with the processor speeds preset. This preset processor speed will override any switch settings on the system board. Connectors, Jumpers, and Switches Switch SW1 Settings (440BX)

  • Page 101: Jumpers (440Bx)

    CAUTION: To reduce the risk of personal injury from hot surfaces, allow the internal system components to cool before touching. WARNING: Be sure to turn off the computer before changing a jumper setting or damage to the system board can result. Compaq Despro EP Series of Personal Computers...
  • Page 102 Disabling or Clearing the Power-On and Setup Passwords (440BX) ) 1. Turn off the computer and any external devices, and disconnect the power cord from the power outlet. 2. Set SW1, position 1, to the ON position. 3. Turn on the computer and allow the operating system to start. This clears the current passwords and disables the password features.

  • Page 103: Jumpers (Intel 810/810E)

    CAUTION: To reduce the risk of personal injury from hot surfaces, allow the internal system components to cool before touching. WARNING: Be sure to turn off the computer before changing a jumper setting or damage to the system board can result. Compaq Despro EP Series of Personal Computers...
  • Page 104 Disabling or Clearing the Power-On and Setup Passwords (Intel 810/810e) 1. Turn off the computer and any external devices, and disconnect the power cord from the power outlet. 2. Disconnect the keyboard, monitor, and any other external devices connected to the computer.
  • Page 105 6. Reconnect the external devices. 7. Plug in the computer and turn on power. ✎ You will need to reset your passwords and any special system setups. Refer to F10 Setup to establish new passwords. Compaq Despro EP Series of Personal Computers...

  • Page 106: Hard Drives

    5.2.1 Using the Cable-Select Feature with Ultra ATA Devices Optional drives are available from Compaq in kits that include a special drive cable. The configuration of the drives employs a cable-select feature that identifies the drives as device 0 (primary drive) or device 1 (secondary drive). The system board determines which drive is device 0 or device 1, based on the way the drives are connected to the special drive cable.

  • Page 107: Drive Jumper Settings

    The actual location may vary slightly from drive to drive. Seagate, Fujitsu, and Western Digital Ultra ATA Hard Drive Jumper Settings Seagate, Fujitsu, and Western Digital Ultra ATA Hard Drive Jumper Settings Compaq Despro EP Series of Personal Computers...
  • Page 108 Maxtor Ultra ATA Hard Drive Jumper Settings Maxtor Ultra ATA Hard Drive Jumper Settings 5-12 Connectors, Jumpers, and Switches...

  • Page 109: Specifications

    PECIFICATIONS Specifications 6.1.1 System Compaq Deskpro EP Series of Personal Computers Continued...

  • Page 110: Interrupts

    System Specifications, continued 6.1.2 Interrupts Specifications ° ° ° ° ° °...

  • Page 111: Dma

    6.1.3 6.1.4 Compaq Deskpro EP Series of Personal Computers Continued...
  • Page 112 Continued Specifications...

  • Page 113: Memory Map

    6.1.5 Memory Map Drives 6.2.1 1.44-MB Diskette Drive Compaq Deskpro EP Series of Personal Computers...

  • Page 114: Ultra Ata Hard Drives

    6.2.2 Ultra ATA Hard Drives Specifications...

  • Page 115: Cd-Rom Drives

    6.2.3 CD-ROM Drives Continued Compaq Deskpro EP Series of Personal Computers...
  • Page 116 CD-ROM continued Specifications...

  • Page 117: Compaq Enhanced Keyboard

    Compaq Enhanced Keyboard 2-Button Mouse Supported Graphics Resolutions 6.5.1 ATI RAGE PRO TURBO 1X AGP ° ° ° ° Compaq Deskpro EP Series of Personal Computers ° ° ° °...

  • Page 118: Ati Rage Pro Iic Agp

    6.5.2 ATI RAGE PRO IIC AGP 6.5.3 NVIDIA RIVA 128 AGP 6.5.4 Matrox MGA G100 AGP 6-10 Specifications...

  • Page 119: Matrox Millenium G200-Sd Agp

    6.5.5 Matrox Millenium G200-SD AGP 6.5.6 Matrox Millenium G400-SG AGP 6.5.7 Integrated Intel 3D Graphics Compaq Deskpro EP Series of Personal Computers 6-11...

  • Page 120: Audio Controllers

    Audio Controllers µ 6-12 Specifications...
  • Page 121 µ Compaq Deskpro EP Series of Personal Computers 6-13...

  • Page 122: Chapter 7 Service Notes

    (spare part number 118053-001) and graphics controller (spare part number 402125-001). 4. Two gaskets are included in the Deskpro EP Series units to minimize vibration caused by the speaker when played at high volumes. The gaskets are located on the access panel directly above the speaker and on the bottom of the slot cover closest to the speaker.

  • Page 123: Index

    access panel spare part number (440BX), spare part number (Intel 810/810e), 2-5 audio controller, specifications 440BX, 6-12 Intel 810, 6-13 battery proper disposal, 4-44 Battery locating on system board, 4-42 bezels spare part number, 2-3, 2-5 boxes, shipping, 2-19 cable select feature, 4-13, 5-10, 5-11 cables, 3-5 service considerations, 3-5...
  • Page 124 1-4 spare part number battery, 2-18 documentation, 2-19 fan, 2-18 mounting brackets, 2-18 speakers, 2-18 specifications CD-ROM, 6-7 Compaq enhanced keyboard, 6-9 diskette drive, 6-5 DMA, 6-3 I/O, 6-3 interrupts, 6-2 memory map, 6-5 mouse, 6-9 system, 6-1 Ultra ATA hard drive, 6-6...
  • Page 125 system design, 1-3 specifications, 6-1 system board spare part number, 2-11 System memory 440BX, 4-30 810/810e, 4-30 system unit spare part numbers, 2-3, 2-5 tools service considerations, 3-5 Ultra ATA devices, 4-13 Ultra ATA hard drive specifications, 6-6 Western Digital EIDE hard drive jumper settings, 5-11 Index I-3...
  • Page 126 181099-001 134011-004...

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