Remove the ribbon cable directly below the viewfinder.

Detach the white plastic clip from its socket with a pair of tweezers.

Disconnect the ribbon cable from the center of the board, near the central hole.

Disconnect the three ribbon cables from the top right of the motherboard, near the selector wheel. One is on the top of the board, and the other two are on the underside.

For more information on disconnecting ribbon cables, look here.