No sound out from my LG Oled, having soundbar 700

[Sallyng]

Starting few days ago, there is no sound from from my TV. Reset TV, Audio successfully out from TV. But when chosen Audio out from Arc, no sound out from soundbar 700. Press TV icon on soundbar remote, TV show HDMI2 now available, yet no sound. 

[BrianJP]

Your in the wrong forum go to Smart Home section. Theres hundreds of similar posts following the firmware update last week.