The most likely problem is that the door switch failed and blew out the fuse, that is why you are having problems with finding the correct part number, there is a kit which includes the switch and fuse, it is part number(NNN) NNN-NNNN You can order the parts you need from the following places, http://www.apwagner.com/, http://www.repairclinic.com/, or http://www.partstore.com/, all of these places offer easy returns and reasonable prices for thier items.
There is no service manual for this model, you can go to http://www.apwagner.com/ if you want to see a diagram of parts..
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Dear Mr. Chas:
I wanted to thank you for your assistance. I ordered the switch and fuse via repairclinic.com and installed these. This did not repair the problem, however. My son and I have "tinkered around" the microwave and tried the new switch and fuse in my neighbor's microwave too, yet to no avail. We also switched out ea other's electrical computer touch pad panel, yet this did work either. I was hoping that maybe we could get one of the two microwave's working by mixing and matching parts between the two separate microwaves. It was a good learning experience for my son and I, and as such, even though we were unable to get them running again, it was enjoyable trying and good education.
We have decided to replace our microwave with a new over-the-oven unit, made by "GE." This is a Convection/Microwave, Model # XXXXX I am not sure what my neighbor may do.
Again, I thank you for your assistance, and I will certainly keep you in mind for any future potential similar technical service needs.
You are welcome, I wish you good luck in everything you do.