Lenovo Thinkbook Series Hardware Maintenance Manual page 58

Screw specifications
M2.5 x 5.5 mm
Step 3. Remove one screw.
Figure 42. Remove one screw
Screw specifications
M2 x 3.0 mm
Step 4. Remove the power button board.
Figure 43. Remove the power button board
Go to
https://support.lenovo.com/partslookup
replacement part:
52
Lenovo Thinkbook series Hardware Maintenance Manual
Number of screws
1
Number of screws
1
to look up the Lenovo part numbers of the following