Lenovo B575e Hardware Maintenance Manual page 70

Removal steps of system board
1
Remove the screw . Detach the connectors.
Step Screw (quantity)
1
M2 × 5 mm, flat-head, nylon-coated (1)
When installing: Make sure that all the connectors are attached firmly.
64
Hardware Maintenance Manual
Color Torque
Black
3.0 kgf-cm