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Re: Microwave made loud popping sound and now does not...
Probably a high voltage diode popped because contaminated grease eventually built up and made a path for a high voltsge arc to occur.. To confirm,take the outer cover off the microwave and discharge the high voltage capacitor by shorting its terminals.Then pull the plug off the magnetron side and place it near the magnetron socket. Now turn the microwave on and push the connector on the magnetron with a chopstick or a long insulated screwdriver. If no arc when you do this this confirms a bad diode.
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Yes it is time to replace it, the magnetron has failed and there are two more parts of concern, the high voltage capacitor and diode are also a factor. The high voltage capacitor and diode work with the magnetron to produce the high voltage that heats the food. The vibrating sound is further evidence the magnetron is culprit.
Well I'm reaching here---if the bulb did not fracture/break then it sounds like a capacitor popped--check your owners manual for reset button but I don't think there is one for the lighting---In addition if you can see the circuit board--look for burn spot or wet spot. GL
Okay, first we need to separate the situations. You were boiling water on the stove and had the range hood fan running to **** up the steam. Then you put something in the microwave to heat and you heard a pop and then zip-o.
The water on the stove has nothing to do with the situation, the fan you turn on is not part of the microwave, so it has nothing to do with the microwave.
The pop you heard and then the humming suggests the magnetron failed. You said you found a blow fuse and replaced it and still nothing, right? The magnetron is the most likely culprit...I would think it is safe to say that the magnetron shorted and drew enough current to blow the fuse.
Replace the magnetron and if that doesn't work, let me know here. Good Luck!
Inexpensive fix yes, but quite dangerous as you have to either replace the High voltage Diode or the magnetron depending on what has gone. Most often it is the Diode as that is fed a few thousand volts and anomolies such as a surge in current cause it to blow(popping sound) You can also check the fuses and if lucky it is just a fuse, but a fuse very seldomly just blows as it points to an underlying fault such as magnetron , capacitor or Diode. Have a service man attend to it unless you know what you are doing as you are dealing with lethal voltages and current even after the microwave has been switched off.