My mate asked me to 'fix' his PS3, but it's got a strange issue.

It plays PS2 games and DVD's. But wont play BR Films and PS3 games.

Knackered lens or repairable without replacement - lens cleaner?

Havent seen it yet, I thought I'd ask in case others have had a similar problem and managed to repair it so at least I'll have a starting point. I think he's tried cleaning the lens though...?