I have a Vizio TV, Vizio soundbar, Xfinity cable box, and a Sony DVD player. I can't get sound from the soundbar when I am watching TV, nor any sound out of the TV speakers. I have an HDMI cable going from the soundbar OUT (ARC) into the HDMI SIDE position on the Vizio TV. I have an HDMI cable going from the soundbar HDMI IN2 position going into the DVD player. I have the Xfinity cable going into the HDMI 1 position on the TV. This is the only configuration where I don't receive a "No Signal" error message when trying to watch TV from the Xfinity cable.