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Re: How to test a diode
To test a diode, first remove it, then use a test meter with a diode check facility. Test component first one way around, then the other. It should give a 1 in one position, and 0 in the other if all is ok.
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Thanks for using FixYa. If it’s a loud hum/buzz sound then 90% it’s usually a bad magnetron and other times it’s a bad high voltage diode. However, from what you have described it seems to be the magnetron. Please do rate the solution if the issue is resolved or post a comment for further assistance.
very possible your magnatron is faulty. Disconnect 2 transformer wires and make sure they dont short. try the program again. if no noise, replace magnatron:capacitor and HV diode Please i strongly suggest an electrician help you as it is truely dangerous in there. .
I had the same problem. I removed the grill and opened the control panel as I read an answer from "GENE" on APP (Appliance Pros) that this indicated a short in the circuit board (TouchPad). I was going to replace the faulty circuit board but when I opened the control panel there it was......One wire harness had just came unplugged!! I plugged it in, reassembled and the microwave works again!