I have the q70t TV and a q60t soundbar. The HDMI Arc only works if NOTHING else is plugged into any other HDMI Input. That includes the 3 other ports on the TV and the one on the soundbar. If I plug anything into HDMI port 1, 2, 3, and the soundbar port, HDMI won't even show up in the setup sound menu at all.
Funny thing, the HDMI audio output selection is not there, but as soon as I unplug everything, HDMI pops up all of a sudden. What am I doing wrong?
Just to clarify, are you connecting anything else to the soundbar? To use ARC, connect all HDMI devices to the television and HDMI ARC port on the television to the HDMI ARC port on the sound bar. Please also ensure that Anynet+ is turned on for both devices.