It seems that after 5 years my Panasonic plasma and Sony receiver started to fight for control with the Panasonic wanting to now be in control of the theater. Its never done this before and it wasn't until the optical cable was connected between the PS4 and Receiver. Now it does no sound when the Panasonic Viera takes over the theater and when I turn it off I get sound through tv and it mutes the receiver. The only fix I have been able to come up with is to use the optical cable between the receiver and tv, now when the Panasonic takes over I get sound through the surround sound only not through the tv and when I turn Viera off it comes through tv only. I don't know why the cable freaked the system out so much, but at least its trying to do something now.