Hi, been looking on the net and can't really find a definative answer. Could be motherboard, could be faulty cooling fan, some mention faulty HDD. Suffice to say it sounds like you're gonna have to ship it away for repairs. If there's a game disc stuck in it there are ways to get that out as a temporary measure. I've had my 60Gb PS3 for nearly 3 years now and it sometimes freezes when it overheats but always comes back after its cooled down but i've never experienced the problem you've described (and don't want to either!). Best of luck RD.