Same symptoms with my onkyo tx-nr585 and 58NU7100. I tried with many HDMI Cables and did not work. After some days trying to connect the receiver and the TV , I just unplugged it all cables and i waited for 5 minutes and.. voila! It works!
Give it a few minutes, hours, or days and it will stop working again. If it works for you for more than 3-4 weeks, please let me know. This may mean that Samsung has fixed the issues with a Sofware update.
Does anyone from SAMSUNG read this topic?
Do they intend to solve this serious problem?
Many customers have poor SAMSUNG experience - all the same without a solution.
I have the same problem with my Samsung KU6179 andPioneer VSX-831.
It used to work all the time (1.5 years). Since yesterday morning my TV does not recognzie my AVR as such. No sound via ARC HDMI of the TV while PS4 and cablebox is working. Also volumeadjustment is no more possible with the TV's and cablebox remotecontrol. Thats frustrating.
Brand new Q6DR and Onkyo TX-NR676 AVR. Previously had a smaller LG hooked up to the Onkyo and HDMI ARC and CEC worked flawlessly. I upgraded to the bigger Samsung for size, and also the built in DirecTVNow app and Apple TV. These were my key reasons for going to Samsung because those features aren't coming to LG any time soon, if ever.
Initially, ARC worked. Then it didn't. Both TV and AVR have latest firmware. I unplugged for a minute and restarted, but still not working.
Guess I'll be getting a digital cable because this problem doesn't seem to even be on Samsung's radar, despite me seeing tons of threads on this exact issue in all sorts of A/V forums.