Just bought a "brand new" (thats what the guy told me) ps3 slim 120gb from cex and started playing a used fifa09 game. As soon as I put it in it makes a really loud grinding sound, like the disc is taking a hammering. If however i stick a dvd in, it sounds fine albeit a slight hum. At the moment I don't have another game or bluray to check it up. Do you think the problem is because of the console or just a faulty game?