NOTE: When replacing the system board, be sure that the following components are removed from
the defective system board and installed on the replacement system board:
●
Memory module (see 
Memory module on page 40)
●
Heat sink (see 
Heat sink on page 65)
●
Processor (see 
Processor on page 68)
Remove the system board:
1. Close the computer.
2. Turn the computer upside down, with the front toward you.
3. Disconnect the display panel cable from the system board.
4. Turn the computer right side up, with the front toward you.
5. Open the computer.
6. Disconnect the speaker cable (1) from the system board.
62 Chapter 6   Removal and replacement procedures for Authorized Service Provider parts