There are five components, including the board, which can cause your condition. The remaining four parts are high voltage (up to 4,000 volts), so I strongly urge you to contact a qualified service technician for this repair.
SOURCE: Microwave makes loud noise and does not heat. Smell of light burning
Chances are you have a bad magnetron.
If
it's within the magnetron portion of the warranty (usually 5-9 years)
but out of the original full warranty (usually 1 year), then your
manufacturer will cover the part cost, but not the cost to visit you or
the labor charge to do the work.
If
you or someone you know decide to look into it, we have critical safety
information, info on door switch diagnosis and replacement, and
disassembly information at our site, and our link is at our listing here on FixYa.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
There
should also be a "mini-manual" hidden inside the unit behind the
control panel or hidden on the left side behind the grille, which is
very helpful when troubleshooting & testing.
We're happy to help you and we'd appreciate your
thoughtful rating of our answer.
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