Joel R Oakdale , MN February 15, 2015 Appliance: Model LMV1683SW Microwave was not heating After checking all of the high voltage components and having them check ok, I figured the magnetron likely was bad even though it checked good with electrically. After replacing it, the microwave worked great. I'm returning the unused parts. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes