5. Keyboard (see Keyboard on page 54)
6. Memory module compartment cover for memory module 1 and 3 (see Memory modules 1 and 3
on page 58)
7. Solid-state drive 1 (see Solid-state drive 1 on page 62)
8. Bottom case (see Bottom case on page 66)
When you replace the system board, be sure to remove the following components (as applicable) from the
defective system board and install them on the replacement system board:
● WLAN module (see WLAN module on page 46).
● WWAN module (see WWAN module on page 47).
● Solid-state drive 2 (see Solid-state drive 2 on page 49).
● Memory modules (see Memory modules 2 and 4 on page 51 and Memory modules 1 and 3 on page 58).
● Fan/heat sink assembly (see Fan/heat sink assembly on page 79).
Remove the system board:
1. Turn the computer right side up with the front toward you.
2. Open the computer.
3. Disconnect the speaker cable from the system board.
4. Close the computer.
5. Turn the computer upside down with the front toward you.
6. Remove the WLAN module Mylar shield (1).
The WLAN module Mylar shield is included in the Mylar Kit, spare part number M23344-001.
7. Disconnect the wireless antenna cables (2) from the WLAN module.
The #1 WLAN antenna cable connects to the WLAN module #1/Main terminal. The #2 WLAN antenna cable
connects to the WLAN module #2/Aux terminal.
ENWW Component replacement procedures 91
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