Don E Peroia , AZ January 16, 2021 Appliance: Model JVM 1974SH001 The diode was bad and that's why the fuse kept popping. The wonderful parts pros on the phone said that it was probably the diode or the magnetron. So we tried the cheapest way first and it worked so happy to have my microwave back and working for only a few dollars rather buying a new appliance. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes