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Sharp R-150 microwave made a buzz sound and shut off, no power to microwave

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Hi,
When the microwave won't heat, but you hear a loud buzz, you usually have a defective power diode, high-voltage capacitor, or magnetron. Also
usually, when your microwave oven doesn't work it all, the internal fuse (thermal fuse) is blown. This fuse protects both you and the oven.
Please let me know if the provided information has been helpful.
Please rate me if the information provided was able to help you.

Posted on Feb 07, 2010

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Posted on Jan 02, 2017

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I understand that you are hearing a buzzing noise from your microwave, even though the door is shut and and it is not running. I would suggest to give the appliance a hard reset. You will do this by either unplugging it or cutting the power off at the circuit breaker for 3-5 minutes. After the 3-5 minutes, bring power back. If you are still hearing a buzzing sound, I suggest either contacting the manufacturer or your local authorized technician.

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