Remove the following screws securing the logic board to the rear case:

Two 2.3 mm Phillips screws

Two 2.7 mm standoff screws

Standoff screws are best removed using a standoff screwdriver or bit.

In a pinch, a small flathead screwdriver will do the job—but use extra caution to ensure it doesn't slip and damage surrounding components.

One non-magnetic 2.7 mm standoff screw

Be sure to put this screw back in its original position at the top of the logic board. A magnetized screw may interfere with the digital compass.