Lenovo IdeaPad S540-15 Hardware Maintenance Manual page 57

Figure 40. Disconnect the cable
Step 2. Remove the screw.
Figure 41. Remove the screw
Screw specifications
M2.0 x 2.0
Step 3. Remove the fingerprint board and its bracket.
Number of screws
1
.
Chapter 4 Removing a FRU or CRU
51