Lenovo IdeaPad 5 2-in-1 14 9 Hardware Maintenance Manual page 60

Figure 43. Remove three screws and remove the system board and the USB board cable
Screw specifications
M1.6 × L1.7
M2 × L4
Step 4. Disconnect the USB board cable from the system board. Then, remove the USB board cable.
Figure 44. Disconnect and remove the USB board cable
Go to
https://support.lenovo.com/partslookup
replacement parts:
System board
USB board cable
Hardware Maintenance Manual
54
Number of screws
1
2
to look up the Lenovo part numbers of the following
Torque
1.2 ± 0.1 kgf-cm
2 ± 0.2 kgf-cm