Remove the following ten screws securing the lower case to the upper case:

• Three 13.5 mm Phillips screws.
• Seven 3 mm Phillips screws.

Wedge your fingers between the lower case and the vent, and lift upward to release the clips holding the lower case to the upper case.

Remove the lower case.

Whenever working near the logic board, it is always wise to first disconnect the battery to avoid short circuits.

Grab the plastic tab attached to the battery connector and pull it toward the front edge of the device.

Pull the tab parallel to the face of the logic board.

Before disconnecting the camera cable, a small plastic retainer stuck to the logic board must first be moved out of the way.

Use the tip of a spudger to push the small plastic cable retainer away from the camera cable socket for enough clearance to remove the camera cable.

Pull the camera cable toward the optical drive opening to disconnect it from the logic board.

The camera cable socket is very fragile. Do not apply any upward force to this socket, as it may break off the logic board. Pull the camera cable parallel to the face of the logic board.

Carefully pull the Bluetooth cable toward the fans to disconnect it from the Bluetooth board.

Pull the cable parallel to the face of the optical drive.

Use the flat end of a spudger to peel the thin plastic cover off the top and sides of the Bluetooth board housing.

Use the flat end of a spudger to pry the Bluetooth antenna connector up and off its socket on the Bluetooth board.