Ughhh!!! I found the incubator unplugged today. I think it has been accidently unplugged for about 24 hours. I know when I checked it last and when a mistake could have been made by DS. Eggs were cold. What do ya think?
Depending on how cold they got and what age they are, some of them could still be viable. The younger they are the better chance they have of surviving apparently. I would just let them go as normal and candle them whenever you usually would, they will probably hatch a little later. I've had the occasional incubator shut off for 12+ hours for one reason or another, and as long as the eggs didn't get really cold (under 60), still had reasonable hatches. http://www.brinsea.com/customerservice/poweroff.html
I read an article recently by John Metzer from Metzer Farms. He had a large order of balut (almost fully formed ducklings for eating) sitting out for a customer. It was apparent the customer wasn't coming. They put the eggs back in the incubator after 72 hrs of being at room temperature and their hatch rate was 75%. At least your eggs were too cool and not too hot! I think they have a good chance of hatching.