For 15-Inch Models - Lenovo IdeaPad 3 Series Hardware Maintenance Manual

Figure 33. Remove the left I/O board bracket
Screw specifications
M2 x L2.8
Go to
https://support.lenovo.com/partslookup
replacement parts:
USB board
For 15–inch models
Make sure the following FRUs (or CRUs) have been removed.
"Remove the lower case" on page 32
Step 1. Disconnect the battery pack cable and the USB board cable from the system board.
Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable.
Number of screws
2
to look up the Lenovo part numbers of the following
.
Chapter 4 Removing a FRU or CRU
51