Asssume we have no idea what on earth you are talking about.
Because we don't.
At least give us a bit of a clue what the blazes you are talking about
I assume it's a microwave - yes?
If so, make and model and a bit more to go on in addition to a "square thing" and "this oval thing"
Without that the best we can offer is
"some thing"
Puzzled, July 2015
