Plasma TV displays snowy line at top of screen, green line to the right

[cantonius]

I have a brand new Optoma PD50A Plasma display connected to a HD cable box, using Monster DVI-D cables. The box is putting out 1080i. At first, I noticed a snowy white / black line at the very top of the picture. Now, I am also getting a green line on the right hand side of the screen. It was originally only affecting SD channels, but now HD as well. Is this a cabling issue, some type of interference or a bad TV?

Thanks for your help!

 

[Mort Corey]

I'd try substituting a generic (Radio Shack) DVI cable first and if the problem still showed, component cables. If the problem goes away...it's the cable or box itself. Do these distortions appear with any other input, ie DVD? Also, make sure the cable box is well ventillated..mine runs pretty warm.

Mort

 

[cantonius]

No, the DVD player looks great. It is using RGB cables, so you are probably right that the actual problem lies in the cable. The only thing that confused me about using RGB for my HDTV signal is that the Optoma instructions indicate you need to convert RGB to a VGA input on the TV. Won't that degrade the signal significantly?

 

[sokrman14]

I have experienced this with Philips plasmas, what they use is a pixel shift, that for some reason they over do. On the Philips, I just took the remote, and used the arrow keys, and they picture literally moved itself and corrected that green line. The purpose is just to prevent burn in, but I dont know why they allow it to go that far with the shifting.