s-video out from 6800gs only black and white

[isometrik]

Just tried hooking up my 27" sony trinitron to the s-video out from my pc only to find the picture in black and white only. The picture comes in fairly clear, but without any color even in the bios. When I hook up a pc monitor via dvi or vga the color is there. I tried messing around with different drivers, even uninstalled the drivers to no avail. I also messed around within the nvidia control panel to change from s-video to composite but it didn't change anything.

The card doesn't have a tv output, just the standard 4 pin s-video. I tried two different cables, but both produce the same result.

Anyone else come across this issue? Any ideas?

[Blanka]

If your TV display's b and w, then the TV is not at the right input with the AV select button. I have a sony TV too, and I know Svid is sometimes B&W, because it is on the composite version of the selected input (I see both Input 1 Y/C AND Input 1 C while toggling inputs.
Are you perhaps using a Svid-SCART adapter?

[Frigo]

Could also be that your Chroma pin is loose on the card. The luma pin carries the sync signal and luminance, so that side comes through as b&w. the chroma carries color, so if you've used two different cables, you might want to take a look at the card.

[isometrik]

I tried switching video inputs on the tv, but the only one where anything showed up was video 1, in black and white. I also inspected the cable and the two ports, all of which seemed to be clean with no bent pins or anything. Should I just bite the bullet and buy a new graphics card?

[Frigo]

If you have another TV, I'd try that, first.

[gazz292]

your TV is in the wrong mode, it's expecting a composite signal which has the colour and luminance signals on the one wire, but s-vid has them on seperate wires,

somewhere in the menu's should be a setting to tell it to accept s-video, i assume your using the main scart connector?? as they can take rgb, composite and s-video, but use the same pin for composite and one of the s-vid's signals, so unless it's told to work in s-video mode, it displays black and white on s-video input.

being a sony trinitron it shoudent be lime the old tv i had, which only had rgb and composite inputs on the scart, no way to feed it s-video via the scart with any adaptors (exept thos which combined s-bid to composite with the loss of quality associated with comosite)

If your using a dedicated s-video port on the tv, it should have it's own AV number, i.e. AV2 or 3, but it could be possible the s-video port it just piggy backed to the scart socket internaly, so you wtill need to tell the tv it's being fed a s-video input to get the colour signal in.