I just bought a new travel trailer with the built in SC-11100 Microwave unit. A couple days after arriving home with the trailer, I thought I'd try the microwave to see how it worked. It worked fine when I pushed the Grill button for one minute, then I pushed the Cook button for one minute. I thought the whole unit was gonna explode, it started arching inside and then after a few seconds, the thing just died. I'm 800 hundred miles away from where I purchased the trailer so I'm sure this will be a headache getting it replaced. I hope you all have better luck with yours. You're right, the manual Jim