Lenovo B4400 Hardware Maintenance Manual - Page 53
Removal steps of system board, unplug speakers connectors in the direction shown
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Figure 10. Removal steps of system board Loosen the screws a . Lenovo B4400 11 1 Step Screw (quantity) a M2.0 × 6 mm, flat-head, nylok-coated (3) Color Torque Black 1.85 kgfcm Detach IO board connector in the direction shown by arrow b , LCD connector in the direction by arrow c , unplug speakers connectors in the direction shown by arrow d , built-in microphone connector in the direction shown by arrow e. e c d b 49
Lenovo B4400
49
Figure 10. Removal steps of system board
Loosen the screws
.
Detach IO board connector in the direction shown by arrow
, LCD connector
in the direction by arrow
, unplug speakers connectors in the direction shown
by arrow
, built-in microphone connector in the direction shown by arrow
.
Step
Screw (quantity)
Color
Torque
M2.0 × 6 mm, flat-head, nylok-coated (3)
Black
1.85 kgfcm
a
1
1
1
a
b
c
d
e
b
d
e
c