I recently purchased a Hisense H9F and I really like the TV, but I’m having a hard time trying trying to pair it to a Soundbar. I have tried both a Sonos Beam and and Sonos Playbar. Spent 6 hours today with Highsense and Sonos and could not get a resolution. Next step is return the TV to Best Buy. The problem is I can’t turn off the internal speakers. When I try to select ARC in the speaker settings it will not accept the selection. Is this a known issue with the H9F and Sonos? I actually had it working for a brief time but then it returned to play internal speakers even when the volume was at zero, if I increased the volume both the TV speakers and Playbar played at once. Any suggestions before I return the set? Is my set or is it a Hisense issue across all the H9F? Thank you.