Go to
https://support.lenovo.com/partslookup
replacement part:
Heat sink
Remove the fan
Make sure the following FRUs (or CRUs) have been removed.
"Remove the lower case" on page 27
Step 1.
Disconnect the battery pack cable, antennas, and camera board cable from the system board.
Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable.
Figure 13. Disconnect the battery pack cable, antennas, and camera board cable
Step 2.
Remove the antennas and camera board cable from the cable guide.
Hardware Maintenance Manual
34
to look up the Lenovo part numbers of the following