Sony str-dg820 avr connected to lg-c9 can't get arc to work


Novice Member
the sony was given to me, I know its old. I am trying to hook it up to an lg-c9 using ARC Via HDMI. The optical cable works avr to lg fine.

But when I try and use the ARC no sound. I am using hdmi-2, earc off on the LG, I connected tothe avr= HDMI-TV-out. I have tried several hdmi cables. All other hdmi ports on the lg are not used-nothing plugged in. In the lg sound menu I have earc off, and have tried pass through, PCM, and auto options. I switch back to tv speakers each time. turn off avr etc. many different combinations as I have read this connection can be tricky due to software.

So any suggestions would be appreciated. Should the lg be set to PCM?


Novice Member
Found this "The STRDG820 has no HDMI ARC capabilities mainly because the HDMI version it utilises pre dates version 1.4 and version 1.4 is required for ARC"

So I guess it does not support it, makes no sense, the manual says it does, it has 7 channels and you need arc to use 7 channels.

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