For me, I found I had to go into the Home -> settings -> Audio (not the quick settings on the left from the gear icon on the remote, the one from the bottom Home menu) and turn on HDMI-ARC and then select "PCM" instead of "Auto". On Auto some Apps like Youtube would work through ARC but Hulu and Netflix would not, but now all apps are working!
HDMI ARC Not Working
in LG webOS Smart TV Questions
Posted
For me, I found I had to go into the Home -> settings -> Audio (not the quick settings on the left from the gear icon on the remote, the one from the bottom Home menu) and turn on HDMI-ARC and then select "PCM" instead of "Auto". On Auto some Apps like Youtube would work through ARC but Hulu and Netflix would not, but now all apps are working!