Credit dot could mean anything. No way should that be a determining factor.
Shit happens. If you bring a game and it was in good working shape when you brought it, not your fault if it goes down. You should definitely do your best to get it back up and running, but you can't prepare for everything.
That being said, I have been to shows where I walk up to play a game and think to myself, "this pos is definitely sitting here for free entry only"