Hi, I have really strange issue with ARC.
I bought LG OLED C9 together with Marantz SR5013 receiver. I wasn't
able to set ARC working with LG and I my overall experience with Marantz
was bad (bluetooth, bad options, lack of settings, bad display...)...it
just wasn't built for home cinema.
I returned Marantz mostly due to ARC incompatibility with LG and gave a chance to new Onkyo TX-NR696.
And it worked flawlessly and I'm more then happy with Onkyo, Everything works perfect and sounds amazing.
there is one strange issue that just makes no sense. ARC is working but
only under certain conditions and I don't know whom should I blame,
Onkyo or LG. ARC is working only if I have one HDMI cable connected, the
main one that goes from Onkyo HDMI ARC port (out) to LG HDMI 2 port
(ARC). If I connect one additional HDMI cable to AV receiver, for
example PS4 HDMI to GAME port of the AV receiver, ARC immediately stops
working and TV switches sound from the 5.1 speakers to TV speakers. When
I plug out the HDMI cable from GAME port after few seconds ARC begins
to function and sound comes out from 5.1 speakers.
make it more complicated, if I plug directly HDMI cable from PS4 to TV
HDMI1 port (so not to go via AV receiver) the same thing happens and ARC
stops working so this must be due to LG and not due to Onkyo, right?
is strange and I cant' find logic behind this. Where's the catch and is
there something that I could try? Currently I'm using 1.4 HDMI cables. I
also tried with 2.0 cable (cheap model) and the problem was the same.