americanaudiophile :
Did you connect the TV optical audio output to the RCA optical input?
Did you turn that output on in the TV menu? You may also have to turn the TV speakers off.
I don't have an optical cable. I used HDMI from amazon box to surround unit to tv. then I tried HDMI from surround to tv and amazon box to tv. I only get sound for dvd, and can't seem to get into surround unit settings or the tv menu for settings.