I tried turning it on this morning as usual, it beeped SOS until I shut it off. I tried turning it on again and I am posting on it right now, it is performing perfectly well. It's the first time it's done this, but it's been having trouble starting lately. Maybe it has to do with the ram install I made about two weeks ago? Could one of the sticks be not properly seated in the computer? I'm kind of stumped as to what it could be. I know it means a hardware failure.