The title basically sums it up. I think it’s really stupid that Nvidia hasn’t fixed the TV output issues for several years, through tens of driver upgrades. Anyway, I tore my hair out screwing around with the Nvidia Control Panel after upgrading to the newest GeForce drivers (175.16) completely killed my TV output. Downgrading to version 169.21 drivers restored output, but it was – you guessed it! – frustratingly devoid of any color.
I tried so many things to fix this, I don’t even want to remember it, so to make a long story short, if you have similar problems, try the hack described on these pages: