I was playing through some DVD's on my CP72 last night and I noticed rolling from bottom to top horizontal lines would appear in the dark loadup screen whenever the player is changing discs or skipping mp3 tracks etc. It appears to be some noise from the internal mechanism because it only does it when chnaging tracks or discs etc and not during playback of any kind. I have it hooked up through the component cables of course. Could this be a ground loop problem of some sort. by the way I have Acoustic Research component cables and it has done the same thing with other cheaer cables so I know it isn't the cable causing because it should be all the time and not during just disc changing and track changing etc. Please check this out on your CP72 and look carefully for it. It isn't a big deal I just want to make sure they all do it so I don't have to send it back. Thanks.