Sounds to me if there is a post issue it could be a CPU problem, rip one out of an Identical server at your office and test this theory. It could have started off as a heating issue but turned into a dead CPU. I had this same issue with an IBM e-server and after changeing the CPU everything was peachy. I really dont think its a Vid card issue, if it was you would have Post errors. usually long beeps. Ram could also be bad too so dont rule it to be a cause of only one problem. But what type of ram are u using and what is the processor type?