Hey folks. I'm reviving this thread to try and find a solution to my problem.\n\nI currently have all of my sources running into my 77" LG CX OLED TV then using ARC back out to my X3300W for sound. It works for now, but I am out of HDMI inputs on the TV and am having an issue with ARC - the AVR will only play in Direct or Stereo. So I would really like to solve the issue I have running my 4k sources through my AVR\n\nFor a refresher, when I send a 4k source to my AVR and try to pass it through to my TV the TV screen goes blank intermittently. On again, off again over and over. It also displayed white dots everywhere when in 4k with HDR. I switched the HDMI cables to Monoprice Slim Premium Certified cables. That did not solve the issue (it may have solved the white dot issue, but I cannot tell because the screen goes blank too often and for too long).\n\nI emailed Denon and they suggested it might be a handshake issue and that I should contact LG to "update the EDID string" (whatever that means) or that I should purchase a $250 EDID emulator (Atlona Etude Sync or Key Digital HD FIX2). I obviously don't want to do that if I don't have to and think it's ridiculous that I would need to given the supposed quality of the AVR and TV.\n\nI tried submitting an email to LG, but after writing a missive I clicked submit and it did not create a ticket or record my inquiry. I will try that again, but in the meantime does anybody have any ideas?