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 65)
●WLAN module (see WLAN module on page 76)
●WWAN module (see WWAN module on page 70)
●Modem module (see Modem module on page 97)
●Processor (see Processor on page 104)
Remove the system board:
1.Position the computer
2.Disconnect the following cables from the system board:
●(1) Bluetooth module cable
●(2) USB connector module cable
●(3)
●(4) SIM board cable
●(5) Power cable
3.Lift the rear edge of the system board (1) until it rests at an angle.
Component replacement procedures 107
