I just got my 17" PB G4 and i'm oooohhh so happy! But i also have a bit of a problem. When i play a dvd i continue to see little white bars on the top of the movieframe from the left side of the screen until the midscreen area. There are about seven to ten bars visible. There very small, maybe it's better to call it pretty thick lines. Each line is about 1 cm. It's doesn't show the lines with every dvd but it does with most of them. Can somebody please tell me what this is and most importantly how i can fix it? thanx!