Remove The Power Board - Lenovo Yoga Pro 9i Maintenance Manual

Figure 11. Disconnect the fan cable and loosen six screws
Step 2. Remove seven screws and then remove the thermal module.
Figure 12. Remove the thermal module
Screw specifications
M2 x L2.8
M2 x L5
Go to https://support.lenovo.com/partslookup
part:
Thermal module

Remove the power board

Make sure the following FRU (or CRU) have been removed.
"Remove the lower case" on page 28
"Remove the solid-state drive (SSD)" on page 30
"Remove the thermal module" on page 32
Step 1. Disconnect cables connected to the power board.
Number of screws
3
4
to look up the Lenovo part number of the following replacement
.
Chapter 4 Removing a FRU or CRU
33