I have a CECH-2101A PS3 with HEN. When I try to load up Black Ops 2, I either get stuck on a black screen which I cant turn off the system by holding it down for a long time or pressing it. It forces me to pull the plug. If it dosen't get stuck on that, it gets stuck on a Dolby screen where I can turn off the PS3, but around 5 seconds after it does 3 beeps, and then turns off. Only sometimes it actually loads. Please help me as whenever I turn it back on, I get the errors " a problem occured the last time the PS3 system was used" with the Dolby screen and after restarting, or the "The system was not turned off properly the last time it was used, file system may be corrupted" error which I get on both.