The magnetron may have either failed or
is not being supplied with the extremely high voltage required to run
it.
Make sure the !!!!capacitor is discharged!!!!!
before attempting any sort of repair.
Check the door interlock
switches first then the high voltage diode with either an AVO model 8
on high resistance range for short circuit, the feed fuse on the
primary of the high voltage transformer and then finally, the
magnetron is best checked by substitution.
Hope that helps.
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Kitchenaid Microwave
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