Robert P Miramar , FL March 19, 2024 Appliance: Model JNM-3151-RF-1SS GE microwave not heating. After some research, and based on the symptoms, consulted with repair person and figured it was the most common 3 parts (magnetron, capacitance, diode, and threw in a new fuse). So spent $190, and service tech came, replaced them, all good again. All done in an hour. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes