Hi, I have the same problem with you, with the same model. I have the board ( bought off flea bay) with latest firmware, non working bluray drive. I thought downgrading it to 3.55, would solve the problem, it didn't. Tried to remarry it even though the bluray board is built in ( just experimenting ), didn't work. some of the hard drive games worked though (probably don't need disc to play). BTW I tried the bluray drive in another ps3, it's working.