Using a spudger, disconnect the display sleep switch from the board.

Remove the 3 black 8mm phillips screws from the outside of the top frame.

Remove the 1 black 22mm phillips screw from the top right of the top frame.

Remove the 1 black 14mm phillips screw from the middle left of the top frame.

Remove the 1 black 4mm phillips screw from the left of the top frame.

Lift off the top frame, being careful to unravel the sleep switch cable from around the SCSI port.