Remove The Heatsink; For Alc Models - Lenovo IdeaPad 3 Series Hardware Maintenance Manual

Figure 21. Remove the solid-state drive thermal pad
Go to https://support.lenovo.com/partslookup
replacement part:
Solid-state drive thermal pad

Remove the heatsink

For ALC models

Make sure the following FRUs (or CRUs) have been removed.
"Remove the lower case" on page 32
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable.
to look up the Lenovo part numbers of the following
.
Chapter 4 Removing a FRU or CRU
43