HP DC7800 - Manual (Page 111)

System Board
1. Prepare the computer for disassembly ( Preparation for Disassembly on page 60 ).
2. Remove the computer access panel ( Computer Access Panel on page 64 ).
3. Remove all expansion boards ( Expansion Cards on page 72 ).
4. Disconnect all cables connected to the system board, noting their location for reinstallation.
5. Remove the heatsink ( Heatsink on page 92 ).
6. Remove the 10 screws that secure the system board to the chassis (1).
7. Slide the system board toward the front of the computer (2).
8. Lift the system board out of the computer (3).
NOTE: When replacing the system board, you must also change the chassis serial number in the
BIOS.
System Board 99