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360 DVD playback - rolling band?

post #1 of 8
1/5/07 at 11:35am
Thread Starter 
I've recently got a new LCD, and running HD stuff through the 360 it looks great. Over the last couple of days I've been watching some SD DVDs for the first time and I'm noticing a slight rolling change in brightness running up the image. That's the best way I can discribe it really, and you only really see it on darker parts of the picture. This is with the 360 running through component. I don't think I saw it last night running through VGA, but the picture's so much better through component that's not really helpful. I'm wondering if it's doing it through component because the 360 isn't so clever at outputing 576 lines, whereas 720 and 1080 it's fine. Does this sound likely or is it the TV causing the image problems (bearing in mine freeview and HD sources are fine) ?

Cheers
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post #2 of 8
1/5/07 at 11:42am
Rolling distortions are usually caused by a power ground loop or interference. Check your cables to make sure signal (video) cables aren't running close and parallel to power cables.
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post #3 of 8
1/5/07 at 11:48am
Thread Starter 
Quote:
Originally Posted by EskimoPie View Post

Rolling distortions are usually caused by a power ground loop or interference. Check your cables to make sure signal (video) cables aren't running close and parallel to power cables.


Everything seems fine, and it's only happening with component, VGA doesn't show the same thing.
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post #4 of 8
1/5/07 at 1:31pm
Yes, it's most likely a ground loop issue. Try this: unplug your CATV wire and see if the problem goes away. If it does, it's a ground loop.

I have the same problem myself and haven't had much luck curing it. I bought a cheap inline passive isolation transformer, but that didn't jive with my HD-CATV channels (fixed the banding issue though). I've ordered a nice power conditioner that has CATV terminals - hoping this fixes the problem.

FYI - I found this site looking for answers to this very question. It's a well documented topic in many threads.
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post #5 of 8
1/5/07 at 1:43pm
Thread Starter 
Quote:
Originally Posted by cwalker3 View Post

Yes, it's most likely a ground loop issue. Try this: unplug your CATV wire and see if the problem goes away. If it does, it's a ground loop.

I have the same problem myself and haven't had much luck curing it. I bought a cheap inline passive isolation transformer, but that didn't jive with my HD-CATV channels (fixed the banding issue though). I've ordered a nice power conditioner that has CATV terminals - hoping this fixes the problem.

FYI - I found this site looking for answers to this very question. It's a well documented topic in many threads.


By CATV do you mean the ariel lead? If so I've tried unplugging it and it still isn't any better.
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post #6 of 8
1/5/07 at 2:02pm
I'm assuming you have cable TV. By aerial are you talking about an OTA antenna?
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post #7 of 8
1/5/07 at 2:10pm
Thread Starter 
Quote:
Originally Posted by cwalker3 View Post

I'm assuming you have cable TV. By aerial are you talking about an OTA antenna?


Yeah, no cable or sky running to this screen (in the UK here ), as it's in the bedroom.
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post #8 of 8
1/5/07 at 4:08pm
Thread Starter 
If I switch the slider on the component cable from HD to SD it stops.
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