Lenovo IdeaPad 3 Series Hardware Maintenance Manual page 51

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"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.
Figure 24. Disconnect the battery pack cable
Step 2.
Loosen six screws and then remove the heat sink.
Figure 25. Loosen six screws and remove the heat sink
Screw specifications
M x L
Go to
https://support.lenovo.com/partslookup
replacement part:
Number of screws
6
to look up the Lenovo part numbers of the following
.
Chapter 4
Removing a FRU or CRU
45

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