Maintenance and Service Guide

Before removing the system board, follow these steps:

1. Shut down the computer. If you are unsure whether the computer is off 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 first unplugging the power cord from the AC outlet

and then unplugging the AC adapter from the computer.

4. Remove the keyboard/top cover (see

Keyboard/top cover on page 34), and then remove the

following components:

a. Battery (see

Battery on page 38)

b. WLAN module (see

WLAN module on page 41)

c. Fan (see

Fan on page 44)

d. Audio/USB board (see

Audio/USB board on page 43)

When replacing the system board, be sure that the heat sink (see

Heat sink on page 59) and the

memory modules (see

Memory module on page 61) are removed from the defective system board

and installed on the replacement system board.

Remove the system board:

1. Release the ZIF connector (1) to which the power button board cable is attached, and then

disconnect the power button board cable from the system board.

2. Release the ZIF connector (2) to which the hard drive cable is attached, and then disconnect the

hard drive cable from the system board.

3. Disconnect the power connector cable (3) from the system board.

System board