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 FIxed 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.
I found an exploded view diagram of of my microwave model which was very helpful. You need only remove outside metal skin by removing 4 screws on either side and 4 more on the back. Remove 4 plastic hole plugs from the top mounting inserts. Gently pull sides out and lift up and back to remove outer skin. The fuse is located on the back right corner behind the control panel. You access from the side. The fuse is under the spreader bar. Lift fuse up gently to remove.
P.S. It was the MSP Capaciter and or the interlock switch, snap apart 21A (19) failure that actually caused the ceramic fuse to blow.
