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:
●WLAN module (see WLAN module on page 32)
●Memory module (see Memory module on page 41)
●
●Heat sink (see Heat sink on page 46)
●Fan (see Fan on page 45)
Remove the system board:
1.Disconnect the following cables from the system board: (1): Power connector cable
(2): Wireless antennas (may include one or two antennas)
(3): Keyboard cable
(4): Webcam cable
(5): Display cable
(6): Power button board cable
(7): Fan cable
(8): Speaker cable
(9): Touchpad board cable
(10): Hard drive cable
2.Remove the four Phillips PM2.0×3.0 screws (1) that secure the system board to the computer.
60 Chapter 5 Removal and replacement procedures for Authorized Service Provider parts