Gerald S Stronghurst , IL June 16, 2015 Appliance: Model JVM1850M2SWS Microwave dead Above the stove microwave took cover off microwave and checked all 4 thermals for continuity and they all passed put in new circuit board and the microwave was still dead went back to the thermals again and found cavity thermal had a blackened connector cut ends off wires and put together with wire nut and microwave worked put new connectors on wires and hooked up thermal tried microwave and it was dead thermal read continuity was good but thermal was bad replace with new thermal and wire connectors now microwave works great 13 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 2+ hours