1. Power OFF all of your devices.I have e activated earc in both tv and receiver but still get no sound.
2. Power ON only the TV - wait 5-10 seconds - the TV has sound over the internal speakers?
3. Power ON the receiver* - did it automatically switch to TV Audio? If not, switch to it. Any progress?
*the receiver might Power ON automatically - triggered by the TV.
Does the receiver have audio from another source than ARC/eARC?