Step 43
Remove the following 5 screws:
One 4.5 mm Phillips in the bottom left corner of the logic board.
Two 6 mm Phillips to the left of the display hinge.
One 10 mm Phillips to the upper left of the fan area.
One 13 mm Phillips to the right of the headphone jack on the metal framework.
Step 44
Disconnect the orange optical drive cable from the logic board.
Step 45
Lift the metal framework out of the computer. Be careful that the orange optical drive cable doesn't catch on the framework and be sure you haven't forgotten to disconnect any other connectors.