Compaq dc7900 Service Reference Guide: HP Compaq dc7900 Business PC - Page 176
Power Switch Assembly
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Power Switch Assembly 1. Prepare the computer for disassembly (Preparation for Disassembly on page 118). 2. Remove the access panel (Computer Access Panel on page 125). 3. Remove the front bezel (Front Bezel on page 126). 4. Remove the chassis fan (Front Fan Assembly on page 162). 5. Rotate the drive cage to its upright position. 6. Disconnect the power switch/LED cable from the system board. 7. Push the two LEDs into the chassis (1). 8. Squeeze the switch holder retaining clips together at the front of the chassis (2) and push the switch assembly into the chassis. Figure 8-58 Removing the power switch assembly 9. Lift the assembly up and out of the chassis, threading the wires through the hole in the drive cage bracket. 10. Remove the assembly from the chassis. To install the power switch assembly, reverse the removal procedure. When installing the left LED, reach through the slot left open by the rotated drive cage to gain access to the hole for the LED. When installing the power switch, you may need to first insert one clip and the power button, then use a flat-blade screwdriver to help guide the other clip into its slot. 164 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis