Lenovo B475e Notebook - Manual (Page 65)

Removal steps of system board
Remove the screw 1 . Detach the connectors.
6
5
7
4
8
3
2
1
Step Screw (quantity) Color Torque
1 M2 × 5 mm, flat-head, nylon-coated (1) Black 3.0 kgf-cm
When installing: Make sure that all the connectors are attached firmly.
Chapter 7 . Removing and replacing a FRU 59