Step 7
Rotate the computer 90 degrees and remove the two Phillips screws from the rear of the computer.
Step 8
Rotate the computer 90 degrees again and remove the four Phillips screws from the side of the computer.
Step 9
Do not yank the upper case off quickly. The case is attached to the logic board via a ribbon cable.
Lift up the back of the case and work your fingers along the sides, freeing the case as you go. Once you have freed the sides, you may need to rock the case up and down to free the front of the upper case.