It isn't only the QLED'S that have the issue, my mu8500 does this as well.  I was dumb enough to buy 2 Samsungs thinking the first one was a fluke. ... View more

Yup, powering them both down temporarily fixes mine as well, what a real. PITA.... ... View more

I made the mistake of buying 2 Samsung TVs a 8000 series and a qled, both have ARC issue and requiring frequent power down resets.   And yes I am using the proper hdmi cable.   Never had these issues with my older non samsung tv. ... View more

Same problem here the ARC randomly works and requires frequent reboots.  I thought it was my Onkyo, but nope it is a Samsung issue...  shame I just purchased another Samsung before figuring that out.   Never again, their s9 phones wont even make a call from my home but the Iphone I have works great here....  no more Samsung for me. ... View more