1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet and then
unplugging the AC adapter from the computer.
4. Remove the battery (see Battery on page 34).
5. Remove the optical drive (see Optical drive on page 35).
6. Remove the bottom cover (see Bottom cover on page 38).
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 modules (see Memory module on page 47)
●
WLAN module (see WLAN module on page 43)
●
Heat sink assembly (see Heat sink assembly on page 49)
●
Fan (see Fan on page 48)
To remove the system board:
1. Position the computer upright, and then disconnect the following cables from the system board:
(1): Speaker cable
(2): Display cable
(3): Power connector cable
(4): Optical drive cable
(5): Keyboard cable
(6): Touchpad cable
(7): Hard drive cable
Component replacement procedures 57
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