User manual COMPAQ DESKPRO EX MINITOWER MODELS MAINTENANCE AND SERVICE GUIDE

[. . . ] Maintenance & Service Guide Compaq Deskpro EX and Deskpro EXS Series of Personal Computers Minitower Models Maintenance & Service Guide Compaq Deskpro EX and Deskpro EXS Series of Personal Computers Minitower Models Notice © 2000 Compaq Computer Corporation. Except for use in connection with the accompanying Compaq product, no part of this guide may be photocopied or reproduced in any form without prior written consent from Compaq Computer Corporation. Patent and Trademark Office are trademarks of Compaq Information Technologies Group, L. P. Microsoft, Windows, Windows NT, and other names of Microsoft products referenced herein are trademarks or registered trademarks of Microsoft Corporation. [. . . ] Do not remove a hard drive while the computer is on or in standby mode. Before handling a drive, ensure that you are discharged of static electricity. For more information about preventing electrostatic damage, refer to Section 3. 1, "Electrostatic Discharge. " Do not use excessive force when inserting a drive. Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic fields such as monitors or speakers. !! 3. 3. 6 Lithium Coin Cell Battery The battery that comes with the computer provides power to the real-time clock and has a minimum lifetime of about three years. See Chapter 4, "Removal and Replacement Procedures, " for instructions on the replacement procedures. ! WARNING: This computer contains a lithium battery. There is a risk of fire and chemical burn if the battery is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, or expose it to temperatures higher than 140ºF (60ºC). CAUTION: Batteries, battery packs, and accumulators should not be disposed of together with the general household waste. 3-6 Removal & Replacement Preliminaries chapter 4 REMOVAL AND REPLACEMENT PROCEDURES This chapter provides general service information for the computer. Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components operate properly. 4. 1 Disassembly Sequence Chart Use the chart below to determine the disassembly sequence for removing components from the computer. 4. 3 4. 4 4. 5 Feet Installation Cable Lock Access Panel 4. 6 Front Bezel 4. 7 Power Button 4. 8 Subpanel and Bezel Blanks 4. 9 Power Switch Assembly 4. 10. 1 Removing an Internal 3. 5-Inch Hard Drive 4. 10. 2 Removing an External 5. 25-Inch Drive 4. 10. 3 Removing an External 3. 5-Inch Drive 4. 11 Expansion Boards 4. 12 System Memory 4. 13 Graphics Cards 4. 14 Processor 4. 15 System Board 4. 16 Lithium Battery 4. 17 Chassis Fan Assembly 4. 18 Power Supply Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4-1 4. 2 Disassembly Preparation Before adding any internal options or performing a removal/replacement: 1. Turn off the computer and any peripheral devices that are connected to it. 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. Disconnect the power cord from the electrical outlet and then from the computer. Disconnect all peripheral device cables from the computer. During disassembly, label each cable as you remove it, noting its position and routing. Keep all screws with the components removed. CAUTION: The screws used in the computer are of different thread sizes and lengths; using the wrong screw in an application may damage the unit. WARNING: To reduce the risk of personal injury from hot surfaces, allow the internal system components to cool before touching. CAUTION: Static electricity can damage the electronic components of the computer or optional equipment. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. For more information, refer to Chapter 3, "Removal and Replacement Preliminaries. " 4-2 Removal & Replacement Procedures 4. 3 Feet Installation Four (4) rubber feet are mounted to the chassis, as shown below. The replacement feet have an adhesive surface and are shipped with a protective backing in place. If necessary, remove the old feet and remove any adhesive residue from the chassis. Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4-3 4. 4 Cable Lock WARNING: To avoid injury, use care in handling the separated pieces of the cable lock bracket; metal edges may be sharp. [. . . ] Dispose of or recycle them by using the public collection system or returning them to Compaq, your authorized Compaq partners, or their agents. 4-32 Removal & Replacement Procedures 4. 17 Chassis Fan Assembly If the unit has a 866 - 933MHz processor, it requires an external chassis fan. 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. Remove the fan from the chassis 3. To install the fan assembly, reverse the above procedure. This fan is used in units with 866-933 MHz processors. Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4-33 4. 18 Power Supply 1. [. . . ]