My ps3 console had this error and I rang Sony. I had to restore default settings which cleared all saved data from the games. So anyone with the problem should make a backup copy of saved data (seemingly easy to do). The console is no longer reading ps3 games but will play dvd and audio. They are picking it up on Friday and replacing it for free with a reconditioned model. The warranty ran out on this console in November 2008 and I will receive 3 months warranty with the replacement. No complaints about Sony but hope this console doesn't give similar problems!!! cod4 was a new game and may be coincidence that the console went bad when it was being played!!