Remove The Fan; Remove The Heat Sink - Lenovo Legion 5 Series Hardware Maintenance Manual

Figure 14. Loosen six screws and remove the heat sink
Go to
https://support.lenovo.com/partslookup
part:
Heat sink

Remove the fan

Make sure the following FRUs (or CRUs) have been removed.
"Remove the lower case" on page 28
"Remove the solid-state drive (SSD) plate" on page 30
"Remove the heat sink" on page 34
Step 1. Disconnect the fan cables from the system board.
Figure 15. Disconnect the fan cables from the system board
Step 2. Remove five screws and then remove the fan.
to look up the Lenovo part number of the following replacement
.
Chapter 4 Removing a FRU or CRU
35