Hope this helps all. I had the same problem with my Samsung tv and got mad and returned it for a TCL. Only problem I had the same issue with it. BUT the TCL website gave me the answers I needed. So I hope they help you all. The Samsung as many new tvs have a HDMI arc connection. They need to match to an HDMI arc soundbar or sound system. And here is what TCL told me. You have to use a highspeed HDMI with Ethernet cable or you will not get sound through it. I bought one and now it works perfectly. I also found out if your sound system does not have HDMI arc then you can use the HDMI cable and a optical cable together. One for sound and the other for the features like one remote controling volume and power. Hope this helps a lot of you. Good luck.
... View more