A SERVICE OF

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d.
Modem module (see
Modem module on page 77)
e. Keyboard (see
Keyboard on page 64)
f.
Top cover (see
Top cover on page 66)
When replacing the system board, be sure to remove the following components from the defective
system board and install on the replacement system board:
●
SIM (see
SIM on page 48)
●
Memory module (see
Memory modules on page 54)
●
WLAN module (see
WLAN/Bluetooth combo card on page 58)
●
WWAN module (see
WWAN module on page 56)
●
Modem module (see
Modem module on page 77)
●
Processor (see
Processor on page 94)
Remove the system board:
1. Position the computer upright with the front toward you.
2. Disconnect the webcam cable (1) and the display cable (2) from the system board, and remove
the cables from the routing clip (3).
3. If removing the system board from model 4530s, remove the two Phillips PM2.5×5.0 screws (1)
that secure the system board to the base enclosure.
4. Lift the optical drive connector latch (2), and then disconnect the optical drive cable (3).
Component replacement procedures
87