Unless it was seated perfectly when the machine was first put together, the “sock” is likely to come off the logic board assembly when you pop the logic board out. To help reassemble, I have this advice:

1. The sock has two parts, a stiffer rectangle part and a softer oval part with ridges. The oval part goes towards the outside (back) of the board assembly (where all the receptacles are for the external connections); the rectangle goes towards the inside of the machine.

2. The rectangle has a stiff, rectangular “magnet-like” piece on one side: that’s the bottom. The top has a slight indentation that fits directly under a “clip” piece on the logic board. That clip is pretty much the only thing holding the sock to the board.

3. The entire sock does not really seat strongly into the logic board, it’s sort of a gravity fit. So don’t look for places to jam things in: just lay the sock in gently and hook it under the clip and just make sure the oval aligns properly around the socket where the AC cord fits in.