Question about Goldstar MA-782M Microwave Oven

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Goldstart Microwave Model #MV1526 1000w Everything works, but does not heat up. Goldstar MAL 783W Same problem as for another Goldstar I saw here. light comes on, turntable turns, and to answer the question about noise, it did change. Usually, there is a sound of perhaps a fan, then a slightly louder high pitched whirring sound. When it stopped working, the second sound got a little louder, deeper in tone with a slight undulation (like a slow "wow wow wow wow") There was no smoke, but maybe a very slight odor, not a bad electrical smell, but not pleasant either. Not necessarily worth fixing, but if it's something simple and cheap...

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With the symptoms you have, I would most strongly suspect a shorted high voltage rectifier diode or a bad magnetron, or a loose and possibly corroded connection on the magnetron's terminal.

The diode is a fairly cheap fix, and the mag will cost more.

The service manual can be downloaded here.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)

http://www.gallawa.com/microtech/mag_test.html
http://www.gallawa.com/microtech/xformer.html

To order Goldstar / L.G. parts, visit Vance Baldwin Electronics. You'll probably have to call them.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Dec 28, 2008

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