Lenovo IdeaPad 5i Pro Hardware Maintenance Manual page 53

Figure 28. Remove six screws and lift up the right hinge. Then, remove the system board
Screw specifications
M2 × L4
M2.5 × L4
Step 3. Disconnect the USB board cable from the system board and remove the USB board cable.
Figure 29. Disconnect the USB board cable and remove the USB board cable
Go to https://support.lenovo.com/partslookup
replacement part:
System board
USB board cable
Number of screws
3
3
to look up the Lenovo part numbers of the following
.
Chapter 4 Removing a FRU or CRU
47