Microwave not working

I have a GE microwave oven model # ZE2160SF01 and it stopped working. The front panel counts down as if it was working but no other noise comes from the microwave.I check the fuse and its fine what do you think is the problem.

One of your interlock switches located behind the control panel and to the left is either not working, or the door is not properly actuating the switches. Check each switch to ensure it is changing state and that the door is contacting all three switches when closed. All this can be done by removing the outer wrapper with a few screws.