A SERVICE OF

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d. Fan (see Fan on page 68)
e. Keyboard (see
Keyboard on page 60)
f. Base enclosure (see
Base enclosure on page 63)
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:
SIM (see
SIM on page 42, if applicable)
Memory module (see
Memory module on page 54)
WWAN module (see
WWAN module on page 56)
WLAN module (see
WLAN module on page 58)
Heat sink (see
Heat sink on page 72)
Remove the system board:
1. Disconnect the following cables:
(1): Right speaker cable
(2): Display panel
(3): Left speaker cable
(4): Touchpad
(5): Smart card reader
70 Chapter 4 Removal and replacement procedures