Just bought this last night. Tried toast this morning, and it worked well. Tonight I pushed "power", then "toast", then "start" . A blue light beside the "toast" button lit up, the unit did nothing, then it went off. Now I can't get it to do anything. Won't turn on at all. I tried unplugging, plugging into another outlet, pushing power button. What happened? The manual does not seem to mention the blue lights at all, so I don't know what they might mean.