1. Turn o 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove any SD card or SD blank from the computer.
5. Remove the following components:
a. Service door (see Service door on page 30).
b. Battery (see Battery on page 31).
c. Base enclosure (see Base enclosure on page 33).
d. Hard drive(s) and internal frame (see Hard drive(s) and internal frame on page 33).
e. WLAN module (see WLAN module on page 40).
f. WWAN module (see WWAN module on page 42).
g. Memory modules (see Memory module on page 44).
h. Solid-state drive(s) (see Solid-state drives (M.2) on page 38).
i. Fans (see Fan on page 54).
j. Heat sink (see Heat sink on page 56).
k. Discrete graphics board (see Discrete graphics board on page 59).
l. Keyboard (see Keyboard on page 62).
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:
●
WLAN module (see WLAN module on page 40)
●
WWAN module (see WWAN module on page 42)
●
Memory module (see Memory module on page 44)
●
Heat sink (see Heat sink on page 56)
NOTE: You do not have to remove the heat sink to remove the system board.
Remove the system board:
1. Disconnect the following cables from the system board (note the routing location of the cables when
removing them):
(1) Speaker cable
(2) WWAN cable
(3) WLAN cable
(4) Fingerprint reader cable
(5) Smart Card reader cable
(6) Touchpad cable
(7) Display LED board cable
Component replacement procedures 65
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