"No Signal" issue on fresh install

[recon]

Hey, just got a tv tuner card from a friend today, its an SAA1731 chip. Trying out sagetv, set it all up, and installed the drivers for the card, windows xp picks it up. i have a coax cable going from the card into the wall. the EPG guide works and is all up to date and correct, but i get no signal on any of my channels.

I don't have any other programs like this to try out(wintv or wmediacenter) and there's enough space on the hdd, that's all i got out of the search. i live in the usa, and i have the card set to composite rather than s-video. there's some rca plugs hanging off an adapter connected to the back of the card, but i figured coax would do the trick. i've really got no experience in this but would love to get it to work.

[ke6guj]

not familiar with that chip, SAA1731 doesn't come up in a search here, and barely even comes up in a google search. What brand/model is the tuner card. Do you see it on this list, http://www.sagetv.com/requirements.html?sageSub=tv ?

[recon]

rather its saa7131 , but i still dont know anymore than that, philips made it or phillips or what ever. its second hand, i dont know any more than that, maybe ill have to take some pictures of it.

this would be a really cool program if my card worked with it, id love to watch tv on my compy.