All, This happened to me yesterday, I got the microwave out of the surround got the bottom off, found the piece, but not exactly sure where it goes back to. Mine has a plastic piece that sort of swivels when the button is pushed. I dont see anything where this piece goes. on a side note not only did the little “peg” fall out, there is another piece that came out that has a hole about the size of the peg in it. I am guessing that peg and this piece fit together. My question is this. Do I need to take the door off, the whole case of the microwave? Thank you very much.