My above the oven microwave has no power. When I replaced the internal fuse, power came on but would not shut off unless I opened the door. When I set the cook timer and pressed start, there was an additional deeper sound as if it just started cooking and the previous sound was just the fan. This deeper sound only stayed on for a moment when the whole thing went dead again. No lights, no beeps, nothing. I hope this makes sense.

There was no model number on the microwave itself. The model number listed came from the lower oven. A sticker ion the microwave has a mfg date of 1994.

I've read some of the other posts and it seems like i may have more than one issue. Where do I start?

Caleb