Step 4
Grasp the white lower case beneath the vent and rotate it up and away from you, pulling it free of the upper case.
Step 5 — Mass Storage Unit
If your mini does not have Airport installed, then skip this step.
Grasp the Airport antenna board and lift it off of the two plastic posts holding it in place. You may need to push back the black plastic tab jutting through the lower left corner of the board.
Step 6
Remove the yellow tape securing the power button cable to the black plastic framework.