Yamaha RX-V781 Arc problem with LG OLED 65B7P

[jmbusso]

Hi, i cant get any audio from netflix or any app through arc connected to the HDMI 2 (on LG oled 65b7p) to AV receiver Yamaha rx-v781 HDMI 1 (arc). I configure the LG OLED, in sound options, and actívate HDMI SIMPLINK (CEC). Also I actívate control HDMI on Yamaha with arc on AV4. Nothing comes out. The only way is using an optical toslink cable. But i want HDMI arc to get ATMOS from netflix or DD PLUS.
I install latest firmware for both equipments. For what is worst it if i connect the OLED to a sony soundbar HT790, ARC Works. is a problem with Yamaha,
Please help

 

[americanaudiophile]

CEC has nothing to do with ARC. You have to turn that on separately in the TV audio menu. The TV will only have one HDMI-ARC input so that's the one that you connect the receiver HDMI output to.
I don't think HDMI-ARC supports any audio codecs not supported by the optical output so it won't help you with Atmos.
The next version of HDMI will do that I think.

 

[Doc_Chronic]

I have the exact same setup as you and I tried a lot of different (and expensive) HDMI cables, nothing worked. I then found a cheap HDMI cable I had lying around, the only difference is that this was a High speed HDMI cable with ETHERNET. When I plugged it in it worked! I've now tried two cables that has ethernet and both work flawlessly. I find it funny that the cheapest alternative was the winner.