well, if you have a cable box, you could route the audio out from your box to your reciever (red & white RCA cables) Or if you dont have a cable box, you could run the same cables from your TV audio out, to you reciever. And finally, if your tv doesn't have audio outputs, then you're pretty much S.O.L
Unless you have a VCR then you could run the cable through the vcr & use the audio outputs on your vcr to your reciever
if you listed the components u have, this could be a lot easier for us to tell you what to do