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

Two 2.3 mm Phillips screws

Three 2.7 mm standoff screws

Standoff screws are best removed with a standoff screwdriver or standoff driver bit. A small flathead screwdriver can also do the job—but use extra caution to ensure it doesn't slip and damage surrounding components.

One 2.5 mm Phillips #000 screw