My laptop has an S-Video out. My girfriend's TV doesn't have an S-Video in. Is there such a cable as an S-Video to CoaxailPaul,
I'm not sure if you mean coaxial as you've stated or if you mean composite. If it's the latter than the converters already mentioned should work. I use the composite to S-video converter from Radio Shack that Andrew uses and I think (although I'm not positive) it can be used in the other direction as well, i.e., S-video to composite.
If you are indeed trying to connect S-video to a TV's coaxial (RF) type input you'll need a modulator like this (which accepts S-video as well as composite video). Then simply run a coaxial cable to the TV.