Remove The Wi-Fi Card - Lenovo IdeaPad S540-15 Hardware Maintenance Manual

Figure 21. Remove the 4 screws
Screw specifications
M3.0 x 3.0
Step 5. Remove the storage drive bracket.
Figure 22. Remove the storage drive bracket

Remove the Wi-Fi card

Make sure the following FRUs (or CRUs) have been removed.
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Hardware Maintenance Manual
Number of screws
4