Lenovo U400 Laptop User Manual


 
44
Lenovo IdeaPad U300/U300s/U400 Hardware Maintenance Manual
Figure 7. Removal steps of system board
Detach eight connectors on system board in the direction shown by arrows
1
2
3
. Remove six screws
4
and one screw
5
.
2
3
2
1
2
1
2
3
4
4
4
4
4
5
When installing: Make sure that all the connectors are attached rmly.
Step Screw (quantity) Color Torque
4
M2 × 2.5 mm, at-head, nylok-coated (6) White 1.5 ± 0.2 kgfcm
5
M2 × 5 mm, at-head, nylok-coated (1) White 1.5 ± 0.2 kgfcm