JE1550GY01 General Electric Microwave

First, I waste $65 by calling some "REPAIR" service. They showed at home and charge me that just to tell me
Second, I researched on the web and ordered a part, which was not the issue. I waste abnother $72
Third, I found Part-Select and got the right answer: the Diode was the problem. Ordered the part form Part-Select and it FIx ... Read more ed it !!!

Note: I did not buy a new microwave because this one is mounted on the wall and it will cost me +$800 just the lowest price.

FIrst shut off the powere to the stove and microwave unit. Since it was a combination unit with the oven, I had to figure out how to remove the bezel around the combo unit (two torx screws in the frame, four screws below) then the screws attaching the microwave unit to the oven unit. Make sure you unplug the three electrical connectors ... Read more before sliding out the microwave unit. Set it on its side. Underneath is a cover for the motor area secured with a screw and the motor unit itself held in by two screws. Unplug the motor making sure you plug it back in the same polarity. Not sure if polarity matters but best to be safe. All are very strightforward and reachable. Reassemble in reverse order, turning on the power to check that everything works before reinstalling the bezel.