Hi, I have had this problem since I've had my dvd player but I've never done anything about it. I have a Philips standalone player(I can look up the model number if that matters) and every dvd I play occasionaly has gray/white blocks or bars that appear then go away. I originally thought this was because I did not have a progressive dvd player or tv, but then I thought many people wouldn't tolerate this at all. The blocks do not appear in the same position of the movie and occur both in fast moving and slow scenes. This happens with both original and backup dvds. Is something wrong with the cable connections? Can someone explain why this is happening without being too technical? Thanks.