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Not getting sound from WebOS applications through my receiver.

dcw@94945

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dcw@94945 Newbie

dcw@94945

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I have a new LG 4k UHD TV. 60" if that matters.  I also have a new Yamaha RX-V481 a/v receiver.  

Try as I might, I can't get the sound from the WebOS apps, like Netflix, Vudu and Amazon prime to play through the receiver. 

Here's the setup:  HDMI from Xfinity set top box to receiver HDMI in. HDMI out from receiver to TV HDMI input. So far so good. 

To move sound from the WebOS apps to the receiver, I have the HDMI-ARC output from the TV to another HDMI input (HDMI 3) on the receiver. That input is not labeled HDMI-ARC, and there isn't any HDMI so labeled on the receiver.I have the TV sound settings set to HDMI-ARC, and SIMPLink is turned ON.  But when I turn the selector on the receiver to HDMI 3 I get no audio.     

Not sure if this is an LG TV or a Yamaha receiver setting issue.  Though I am nearly certain that it is a user error issue.

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