Lenovo M4400s notebook - Manual (Page 64)

Removal steps of the power board
Remove the screws 1 .
1
1
1
Step Screw (quantity) Color Torque
1 M2.5 × 5 mm, flat-head, nylon-coated (3) Black 0.392 Nm
(4.0 kgf-cm)
In step 2 , open the LCD hinge by pivoting it upward. Then detach the connector.
2
4
3
When installing: Ensure that the connector is attached firmly to the system board.
Remove the power board.
5
58 Hardware Maintenance Manual