[mythtv-users] OT: Optimising 50Hz over 60Hz VGA (was: Smoother video playback?)
ryan.goat at gmail.com
Wed Apr 11 12:44:53 UTC 2007
On 4/11/07, Flo <flo at flobittner.de> wrote:
> There's only one thing left with my picture, sometimes there's like a wave
> moving downwards through the picture. I think there's a difference in the
> vertical sync of my lcd and the graphics card. But i'm not sure because
> hard to describe and to find anything about that...
Sounds like a ground loop problem to me. in short, the LCD and the computer
both have their power cords connected to ground. But there is a small
voltage difference between the LCD's ground and the computer's ground. This
causes a small current in the ground signal of the video cable going between
the LCD and computer.
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