I just bought the Sonos Arc SL Bar, connecting to my TV LG-70UK6570AUB via HDMI ARC. When my cable box and sonos are connected via HDMI, no sound through Sonos ARC. I can only get sound when I disconnect everything else or if I connect to Optic connection (Optic connection works on TV and Streaming but I loose “Dolby” sound). This happens every time the TV is turned off and on but if the system detects the cable box... no sound. My Cable box doesn't look modern and neither can't set up or modify the type of audio for the cable box. PLEASE HELP!!!!
Best answer by Ken_GriffithsView original