Lenovo B4400 Hardware Maintenance Manual page 53

Figure 10. Removal steps of system board
Loosen the screws a
Step Screw (quantity)
a M2.0 × 6 mm, flat-head, nylok-coated (3)
Detach IO board connector in the direction shown by arrow
in the direction by arrow
by arrow d , built-in microphone connector in the direction shown by arrow
e .
e
.
1
1
1
c , unplug speakers connectors in the direction shown
c
Lenovo B4400
Color Torque
Black 1.85 kgfcm
b
, LCD connector
d
b
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