Remove The Fans - Lenovo 20V9003DIX Hardware Maintenance Manual

"Remove the lower case" on page 58
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernails to pull the connector to unplug it. Do not pull the cable.
Step 2. Peel off the pieces of tape.
Figure 56. Peel off the pieces of tape
Step 3. Remove three screws and then remove the heat sink.
Figure 57. Remove three screws and then remove the heat sink
Screw specifications
M2 x L3
Go to
https://support.lenovo.com/partslookup
part:
Heat sink

Remove the fans

Make sure the following FRUs (or CRUs) have been removed.
Number of screws
3
to look up the Lenovo part number of the following replacement
.
Chapter 4 Removing a FRU or CRU
61