Lenovo U400, U300S manual Removal steps of system board, Step, Screw quantity, Color, Torque

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

1

2

3

5 4 4

4

4 4

2

When installing: Make sure that all the connectors are attached firmly.

Step	Screw (quantity)		Color	Torque
4	M2	× 2.5 mm, flat-head, nylok-coated (6)	White	1.5 ± 0.2 kgfcm
5	M2	× 5 mm, flat-head, nylok-coated (1)	White	1.5 ± 0.2 kgfcm

44