Compaq 178960-004 Deskpro EN Series of Personal Computers Maintenance and Serv - Page 77

Power Supply

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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. 2. Lay the computer down on its large base (side with feet) for greater stability. 3. Remove the access panel (Section 4.6). 4. Disconnect all power cables from the mass storage devices and the system board. ✎ Power connectors are keyed for correct installation. Note the orientation of each cable connector and the routing of the cables to facilitate reassembly. 5. Remove the four screws that secure the power supply to the back of the chassis. 6. Slide the power supply toward the front of the computer, then lift up to remove it from the chassis. To replace the power supply, reverse the above procedure. 4-40 Removal and Replacement Procedures

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4-40
Removal and Replacement Procedures
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.
2.
Lay the computer down on its large base (side with feet) for greater stability.
3.
Remove the access panel (Section 4.6).
4.
Disconnect all power cables from the mass storage devices and the system board.
✎
Power connectors are keyed for correct installation. Note the orientation of each
cable connector and the routing of the cables to facilitate reassembly.
5.
Remove the four screws that secure the power supply to the back of the chassis.
6.
Slide the power supply toward the front of the computer, then lift up to remove it from
the chassis.
To replace the power supply, reverse the above procedure.