My LG TV sound is fine and works but when ROKU is on
the sound is off All TV indicators say the volume is high and not muted.
I have tried resetting everything and think I have gone through all settings with ROKU.
Go to All Settings, Sound, HDMI Audio Format, change your HDMI input from PCM to BitStream
On my LG B7 there is no HDMI Audio Format setting under Sound Settings!