Lenovo Thinkbook Series Hardware Maintenance Manual page 56

Figure 38. Remove two screws and open the left hinge
Screw specifications
M2.5 x 5.5 mm
Step 2. Disconnect the connectors from the I/O board. Then, remove the I/O board.
Figure 39. Disconnect the connectors from the I/O board and remove the I/O board
Go to
https://support.lenovo.com/partslookup
replacement part:
I/O board
50
Lenovo Thinkbook series Hardware Maintenance Manual
Number of screws
2
to look up the Lenovo part numbers of the following