htpc, hdtv and ripple effect on screen

[tviceman]

Is it normal to notice a ripple floating down the T.V. screen when compensating for overscan? It's barely noticeable but when my eye catches it, it drives me nuts.

 

[TastesLikeChicken]

It's not normal. TV model? Video card? Driver version? Connection method? (DVI, HDMI, VGA)

 

[tviceman]

It's not normal. TV model? Video card? Driver version? Connection method? (DVI, HDMI, VGA)

The TV is a Samsung 50" LED-LCD (edge lit) 120hz 1080p TV. Using HDMI, gtx560ti, latest WHQL drivers. The drivers auto-adapt for the overscan, and are converting 1920x1080 to a slightly lower custom resolution. All programs are selected to run at 1920x1080 and the conversion is done via the nvidia driver.

 

[TastesLikeChicken]

The TV is a Samsung 50" LED-LCD (edge lit) 120hz 1080p TV. Using HDMI, gtx560ti, latest WHQL drivers. The drivers auto-adapt for the overscan, and are converting 1920x1080 to a slightly lower custom resolution. All programs are selected to run at 1920x1080 and the conversion is done via the nvidia driver.

Samsungs have a setting called "Screen Fit" that enables a mode that doesn't require overscan adjustments. Set your TV to that mode and it should resolve your problems.

 

[tviceman]

Hey you know more about my TV than I do! Screen fit did get rid of the need to create custom resolutions, but it did not fix the rolling scanline issue. :/

Any other suggestions?

EDIT: I can now confirm the rolling line is also present when watching television through the cable box via HDMI. Is my TV bad?

 

[TastesLikeChicken]

I have a Samsung as my bedroom TV so I'm somewhat familiar with the settings.

If that didn't get rid of the issue it could be any number of things ranging from driver settings, to cabling, to line interference. Unfortunately that involves a long process of elimination. Are you ready to bang your head?

 

[tviceman]

I have a Samsung as my bedroom TV so I'm somewhat familiar with the settings.

If that didn't get rid of the issue it could be any number of things ranging from driver settings, to cabling, to line interference. Unfortunately that involves a long process of elimination. Are you ready to bang your head?

Digging deep with google, I'm finding that a common cause of this problem is a ground issue at the particular ac outlet and/or the power strip. If that is actually what the problem is, I can live with it knowing my hardware is not at fault. :/ But since it's happening with two different HDMI cables plugged into different slots on the TV, and thus two different video sources, I know it's not specifically the PC's problem now.

Thanks for the help.

 

[CubanlB]

As soon as I read the OP I thought ground loop. Is the rolling line purple and/or green?

Had any luck getting rid of it? Are all of your components on the same power strip/outlet? You mentioned you have cable, tried disconnecting the coax from the wall?

I can't tell you how many ground loops I have fixed caused by cable installers not grounding properly before coming into the home...