Most newer tv's now have "sound out" to external speaker systems. You should be able to use RCA cables (red for one side and white for the other). These two cables should connect to the back of your sound system (usually AUX 1 or AUX 2). Then you can listen to tv through the stereo system.
Mike & Gail
2011 Greyhawk 31SS
prevoiusly had a Jayco Jay Flight 26BH - loved it! :)