Used dorian, and halfway through my cuts it seemed to be losing power. I began a next cut, and it was not firing. No beam was coming out. I looked up things on the forum and it led me to believe that the breaker might have been shorted. Someone connected the vaccuum to the same plug, and from past posts—it seems like that is the cause for a shorted breaker.
I did use the vaccuum, but did not pay attention to where it had been plugged in before me. I saw that the breaker box in the lounge has a sticker that says do not touch, so I did not open it to check.