We begin trying to get to the logic board by removing this small black plastic rim.

Once within the case, all screws are Phillips #00. There are marked on the logic board with arrows, triangles, boxes, and crosses. From what I can tell, an arrow means that it just goes through the logic board cover. A triangle means that it is a longer logic board cover screw. A cross means that it holds on a plastic piece, and a box means that it holds on another EM shield / or heat sink.