Flip over the optical drive enclosure. There are four ribbon cables connected to the circuit board. Using a spudger or your finger, lift each ribbon cable latch and disconnect each ribbon cable.

Remove the three screws on the board with a Phillips #00 screwdriver.

Remove the two silver screws on the bottom of the case. These screws are different from the ones on the board and should be kept separate.

Note: The longer of these two screws holds down a metal tab that comes loose as seen in the third picture.