GE Microwave Dead

My GE RVM1435WH001 went dead this morning. The power cut out while I was using it. Everything is dead, the lights, display clock, keypad, just like there was a power failure. But the recepticle has power. Could it be a fuse, and if so where is it and how difficult is it to replace? I looked the unit over pretty good and didn’t see anyplace I could check it. Is there4 anything else it could be beside the fuse? Thax for any help, Bob

OK, today I plugged in the microwave and it is getting power. I put in a cup of water and turned it on full power. The water did not get warm and the unit made an odd buzzing sound for a few seconds but did not shut off or lose power. I am thinking this microwave is shot. Is there anything I can check before replacing it?