Lenovo IdeaPad S540-14 Series Hardware Maintenance Manual page 60

"Remove the lower case" on page 31
"Remove the battery pack" on page 32
"Remove the LCD module" on page 44
"Remove the LCD bezel and hinges" on page 50
"Remove the LCD panel and LCD cable" on page 52
Step 1. Disconnect the cable between the camera board and microphone board.
Figure 49. Disconnect the cable between the camera board and microphone board
Step 2. Remove the camera board.
CAUTION:
The camera board is fragile and easily-bent. Remove it with care.
Figure 50. Remove the camera board
Step 3. Remove the microphone board.
CAUTION:
The microphone board is fragile and easily-bent. Remove it with care.
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Hardware Maintenance Manual