Tv-tunner cannot render audio capture stream

What cable connections are you using? HDMI has to be enabled on you motherboard (high def. audio), if its S-Vidio you must run a seperate and dedicated audio cable from headphone jack to TV.
My first gues would be to right click your audio icon on your desktop toolbar and check your playback and recording settings, make sure the tuner card is the source, hope this helps!