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Remove the system board:
1. Disconnect the battery cable from the system board.
2. Disconnect the volume button board cable (1) from the power button board.
3. Release the left microphone (2) from the clip built into the bottom case.
4. Release the rear-facing webcam (3) from the clip built into the bottom case.
5. Release the right microphone (1) from the clip built into the bottom case.
6. Release the forward-facing webcam (2) from the clip built into the bottom case.
7. Remove the two Phillips PM1.4×2.3 screws (3) that secure the communications bracket to the
system board.
8. Remove the communications bracket (4).
Component replacement procedures
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