From time to time I have had trouble trying to boot up certain disks in my sony player. Austin Powers: Spy Who Shagged me (from time to time), Macross Plus Pts 3& 4. Today it did it with Ninja Scroll. I crapped a brick! Needless to say all in all my dvd's are in pretty good condition hardly any if any scratches at all. I tried them in my computer drive and they work everytime. Is it possible for my lens to be dirty or something else. Remember that some of these problems occur off and on. Though Ninja Scroll doesn't want to boot up in my player at all now. My player is the Sony S530D Thanks for whatever reponses you guys could help me with. I am kinda at a loss.