Barie D Penn Valley , CA November 14, 2015 Appliance: Model JEN-AIR Noisy grinding sound coming from microwave After research on the internet I concluded that the problem was the turntable motor making the noise. The repair was relatively easy. Just a philips and a star screwdriver was needed. By simply romving the screws from the bottom of the microwave the turntable motor could be removed andvreplaced. The new motor fit perfectly and the grinding noise is gone. 11 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes