Remove The Fan; Fan; Make Sure The Following Frus (Or Crus) Have Been Removed; Remove The Lower Case - Lenovo 15ALC05 Hardware Maintenance Manual

Figure 45. Remove five screws and remove the heat sink
Screw specifications

M2 x L3

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 52
"Remove the battery pack" on page 53
Step 1. Disconnect the fan cables from the system board. Remove two screws and then remove the fan.
Figure 46. Remove two screws and remove the fan
Screw specifications
M2 x L5
Go to
https://support.lenovo.com/partslookup
parts:

Fan

56
Hardware Maintenance Manual
Number of screws
5
to look up the Lenovo part number of the following replacement
Number of screws
2
to look up the Lenovo part number of the following replacement