It is either the PS-2's laser "eye" fault or the DVD disc is faulty. If you can play games OK then I guess the PS-2 is OK. If you can't play games nor watch a variety of DVDs then I guess the PS-2 laser "eye" is faulty. If it plays games OK but doesn't play any DVDs then I don't know. You can also try cleaning the laser "eye" with a CD cleaner. For a replacement laser "eye" see: http://www.playstationchips.co.uk/pages/ps2spare-parts.html