I have a Goldstar over the range microwave. It was manufactured in April 2007. The model number is MV1610WW, the serial # 704TAYV00682. It was working fine one minute then literally the next no heat. Everything else seems to work fine [, clock, timer, turntable, fan, the light underneath. It just doesn't heat up anything. i used it 5 minutes before and it worked fine. Please, someone tell me if I can fix this and how. It is mounted to the wall above the stove with the backsplash surrounding it, so I hope I do not have to tgake it down to repair or place it. Thanks