I woke up to a similar problem with my brisket this morning, however, I had injected the brisket. I was smoking the meat for roughly 4 hours at 180, turned it up to 195 around 3:30am (internal temp was showing only around 100), went back to sleep. At 5:30, I noticed the smoker had turned off. Smoker maybe around 115, internal temp around 127, not sure how high it got.... I've got it going at 225 now... is it ruined?