[Richard]

There is a secret to removing the ones that Newell used. The two front screws are obvious because you can see them just over the stove top. But you have to remove the stove vent screen to get to the other one (or two).

Plus, if the microwave just goes dead, but you are sure you have power, there is a glass fuse inside the cover on the circuit board. Of course, it has to come out of the hole, and the cover has to removed to get to it.