Question about GE Spacemaker JVM1640SJ Microwave Oven

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Ginding, buzzing noise

When you turn the microwave on, a terrible grinding, buzzing noise starts after about two seconds. It appears that the center is no longer moving. We removed the plate, but it still happens. Cannot tell if it still is heating because we can't take the noise.

I can tell that the oven was built in 2000 but do not have any literature on it.

Thanks for any help.

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Re: Ginding, buzzing noise

Sounds to me like the magnatron stopped working.

Posted on Dec 30, 2007

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Magnetron If the microwave is loud or noisy only when cooking, the magnetron tube might be defective. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. Under normal circumstances the magnetron is nearly silent. However if it is damaged or nearly burned out it can begin emitting high pitched or growling noises. It's not normally dangerous to use a microwave oven when it makes these noises, but they are an indication that the magnetron is almost dead and will need to be replaced.
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