The problem here is either going to be the magnetron, High voltage capacitor, High voltage diode or the door switch. This is not a good DIY fix because factory test equipment will be needed to accurately diagnose the problem plus the unit stores lethal voltage even when unplugged.I recommend you take the unit down and take it to a experienced workshop to have it fixed. The cost would be anywhere between $150 - $250, Bearing in mind that most new units cost around $229 you may want to look for a new unit.After the warning given if you decide you want to fix this yourself and have a multi meter and amp meter I would be happy to assist you further :)
I have a multi meter/amp meter what do i do ?
diode is good it reads 63.8v next?
if i'm doing this right then there's 0 resistance between the terminals and no reading between terminals and housing, next?
Well I tested the transformer it was good ,( confused) had it tested by a retired appliance guy , he said it was good ( more confused) tested the magnetron again , it was good , reassembled the mic now it works , go figure . Not sure what I did wrong or right but it works .Thanks for your help .