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07-05-2008, 11:59 AM
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Microwave made loud cracking noise
Model Number: JVM190K 004 Brand: GE Age: More than 10 years
Unit is a combination under cabinet unit. While cooking on the stove top I tried to use the Microwave and when started it make a loud crack and would no longer microwave anything. Everything else works including the convection portion.
Please advise     
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07-06-2008, 05:30 AM
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Probably a high voltage diode popped. To confirm, I take the outer cover off the microwave and discharge the high voltage capacitor by shorting its terminals.
I 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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