Microwave would not heat food. All other functionality was working as expected

I disconnected the power. Took off the front panel that was held together by two screws. Reviewed the schematic that was inside. Located the switches, saw which lead was burnt. Unscrewed the two screws that held the switch in place, cleaned the connector, and put the switch in and connectors back. Powered the device, tested for cooking/heating functionality. It worked, Closed the front panel