Remove The Heat Sink And Fan Assembly - Lenovo IdeaPad S540-14 Series Hardware Maintenance Manual

Figure 11. Remove 1 screw
Screw specifications
M2.0 x 3
Step 5. Remove the Wi-Fi card by pulling it away from the slot.
Figure 12. Remove the Wi-Fi card

Remove the heat sink and fan assembly

Make sure the following FRUs (or CRUs) have been removed.
"Remove the lower case" on page 31
"Remove the battery pack" on page 32
"Remove the Wi-Fi card" on page 34
Step 1. Disconnect 2 cables from the system board.
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Hardware Maintenance Manual
Number of screws
1