GE Dual Wave II - Microwave "popped"

While heating a cup of water in the microwave. An electrical "pop" was heard coming from the microwave then the lights on the control panel went off. The circuit breaker did not flip off. The microwave no longer works. What happened? Is it something I can repair?

I appreciate the warning. This info pleases my wife for obvious reasons. She is making a case to buy a new unit.