First projector I ever bought. Picked it up at a surplus store where it worked fine. Now it randomly shuts its self off, and often will not attempt to come back on after hitting the power button. The fans might be a problem and the unit might be overheating. but still, shouldn't it go through a shut down sequence? Anyway, any common problems people have relating to projectors shutting off would be helpful. I don't really know what's wrong and hope to use your examples to diagnose the problem.