Help with S-video out problem

I'm experiencing a rather annoying problem with my Gainward Geforce 6800
GS Bliss pci express graphics card when I am trying to watch video
output on my analogue TV. The problem is that the quality is extremely
poor the picture is fussy and you can see the screen refreshing
constantly.

At the moment I'm connecting via s-video from pc to TV and using
I/pal and my TV is set to pal, the picture is in colour but is
extremely poor in quality, if changed from pal to ntfs the picture
changes to black and white but the quality of the image is greatly
improved. I know that the hardware is working okay as I have
previously had this setup working, it wasn't until a system format
that I have started to experience problems.

I have tried the supplier's drivers from cd with no luck and the
latest nvidia nforce drivers also with no results, I have also tried
disabling directx to see if this is the cause of the problem to no
effect. The issue does seem to be with the drivers for the graphics
card, as if the drivers are uninstalled and the pc booted with the
windows vga drivers then the quality is remarkably improved on the TV.
I have tried a few different driver versions to attempt to resolve
this problem with no success, although there must be a set that worked
as i have previously had this working. So at present im out of ideas
other than flashing the bios of the graphics card in the hope that
this allows it to work better with the new driver releases but i dont
want to take this step if there is a simple solution that i am missing, does anyone have any ideas or know of a good driver release that might resolve the issue ? Any help at all would be fantastic.

 

Try the easiest solution first: replace the s-video cable

 

thanks, i have tried this already with no luck, i have also tried a Composite connection to av3 which also suffers from the same problems. The issue appears to be driver related as if the current drivers are uninstalled and i just boot to windows with the xp vga drivers the display on the tv is remarkably improved. This would suggest thats is a driver issue but i dont know what driver i was previously using before i formatted, does anyone know of a common conflict with the Nforce drivers i might be suffering from ?