Remove The Heat Sink - Lenovo IdeaPad Pro 5 Hardware Maintenance Manual

Figure 13. Remove the touchpad board cable
Go to
https://support.lenovo.com/partslookup
part:
Touchpad board cable

Remove the heat sink

Make sure the following FRU (or CRU) has been removed.
"Remove the lower case" on page 28
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 system mylar.
Figure 14. Peel off the system mylar
Step 3. Peel off the tape. Remove three screws and then remove the heat sink.
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Hardware Maintenance Manual
to look up the Lenovo part number of the following replacement