Was running the vent on my JVM240BL GE Spacemaker Microwave Oven; and put some butter into melt, hit the 30 second button and the microwave quit working. No vent, no display, nothing. Checked the circuit breaker and nothing was tripped. Unplugged it and plugged back in - nothing. Plugged it into another outlet and, again, nothing. What happened? I know I've used it previously while the vent was on. Is it dead in the water? Help!