I have a Sony Bravia 4K UHD smart television that I've connected to my FIOS set top box using a high speed HDMI cable. For some reason I am not getting any sound. The sound was fine for the first few weeks after I got it. I've tried all the audio settings for the cable box and tv set and done all the restarting, resetting, on/off procedures for both the tv and the set top box. The hdmi cable is brand new and I've tried all the HDMI connections. I am able to get sound when viewing Netflix or Amazon video. Additionally, when testing on my old LG HD TV I get sound as well. I'm testing on a secondary bedroom set top box model "ARRIS IPC1100P2".
This seems to be an issue with the tv set or the connection. Any ideas what might be happening?
Thanks