Lenovo B470e Notebook - Manual (Page 60)

Removal steps of system board
Remove screws 1 . Unplug the microphone connectors in the direction shown by arrows 2 .
2
2
1
1
Step Screw (quantity) Color Torque
1 M2 × 7 mm, flat-head, nylon-coated (2) Black 3.0 kgfcm
When installing: Make sure that all the connectors are attached firmly.
54 Hardware Maintenance Manual