I have a DENON sound bar which I have been using with my LG and Panasonic 4K tv's. System was working well until I bought a new Hisense 49" class 4k TV (6 series). All efforts to make the sound bar work has thus far failed. This includes changing the TV speaker system to ARC and turning the sound bar on and off. Any suggestions? Looks like Hisense TVs have a problem with connecting to sound bars.