4. Remove the battery (see Battery on page 39).

5. Remove the following components:

a. Hard drive (see Hard drive on page 40)

b. Optical drive (see Optical drive on page 46)

c. Keyboard (see Keyboard on page 50)

d. Switch cover (see Switch cover on page 47)

e. Speaker (see Speaker on page 53)

f. Display lid switch module (see Display lid switch module on page 54)

g. Display assembly (see Display assembly on page 55)

h. Top cover (see Top cover on page 59)

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 45)

●WLAN module (see WLAN module on page 42)

●Processor (see Processor on page 73)

●ExpressCard assembly (see ExpressCard assembly on page 78) Remove the system board:

1. Remove the RJ-11 jack (1) from the clip built into the base enclosure and remove the RJ-11 jack cable from the hook (2) built into the base enclosure.

2. Disconnect the fan cable (3) and the Bluetooth module cable (4) from the system board.

66 Chapter 4 Removal and replacement procedures