Compaq Deskpro EN Series Maintenance & Service Manual page 7

4.2 Routine Care ....................................................................................................................4-3
4.2.1 General Cleaning Safety Precautions ................................................................4-3
4.2.2 Cleaning the Computer Case .............................................................................4-4
4.2.3 Cleaning the Keyboard ......................................................................................4-4
4.2.4 Cleaning the Monitor.........................................................................................4-4
4.2.5 Cleaning the Mouse ...........................................................................................4-5
4.3 Service Considerations.....................................................................................................4-5
4.3.1 Power Supply Fan..............................................................................................4-5
4.3.2 Tools and Software Requirements.....................................................................4-5
4.3.3 Screws................................................................................................................4-5
4.3.4 Cables and Connectors ......................................................................................4-6
4.3.5 Hard Drives........................................................................................................4-6
4.3.6 Lithium Coin Cell Battery .................................................................................4-6
chapter 5
Removal & Replacement Procedures
5.1 Serial Number ..................................................................................................................5-1
5.2 Installing the Personal Computer.....................................................................................5-2
5.2.1 Self-Mounting Method ......................................................................................5-2
5.2.2 Mounting Bracket Method.................................................................................5-4
5.2.3 Drawer Installation Method...............................................................................5-7
5.3 Disassembly Sequence Chart ...........................................................................................5-8
5.4 Preparation for Disassembly ............................................................................................5-9
5.4.1 Unlocking the Smart Cover Lock ....................................................................5-10
5.5 Computer Feet................................................................................................................5-12
5.6 Cable Lock Installation ..................................................................................................5-13
5.7 System Unit Cover.........................................................................................................5-15
5.8 Hood Latch Retainer ......................................................................................................5-16
5.9 Expansion Board Cage...................................................................................................5-17
5.10 Expansion Board............................................................................................................5-18
5.11 Easy Access Power Supply ............................................................................................5-19
5.12 System Board .................................................................................................................5-20
5.13 System Board Components............................................................................................5-21
5.13.1 DIMM Memory Modules ................................................................................5-21
5.13.2 Graphics Memory ............................................................................................5-23
5.13.3 Microprocessor ................................................................................................5-24
5.14 Replacement Battery ......................................................................................................5-25
5.15 Power Switch Cable Components..................................................................................5-26
5.15.1 Switch Cable Assembly...................................................................................5-26
5.15.2 Switch Mounting Bracket Assembly ...............................................................5-28
5.15.3 Smart Cover Lock Solenoid ............................................................................5-29
5.16 System Unit Cover Assembly ........................................................................................5-30
5.16.1 Front Bezel and Cover Release Buttons ..........................................................5-30
5.16.2 Power Button ...................................................................................................5-31
5.16.3 Bezel Blank......................................................................................................5-32
5.17 Mass Storage Devices ....................................................................................................5-33
5.17.1 3.5-Inch Diskette Drive ...................................................................................5-33
5.17.2 5.25-Inch Slimline CD-ROM Drive ................................................................5-35
5.17.3 3.5-Inch Hard Drive.........................................................................................5-39
5.18 Easy Access Drive Cage ................................................................................................5-41
5.19 Speaker Removal ...........................................................................................................5-42
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