Interestingly, I have this same issue on my NU7400, but it only ever does it once after a period of time that the TV has just been switched on.
Particularly annoying when you play first person shooters and the TV decides it just want to reset the game mode.
I'm beginning to think that the 2018 models are fundamentally flawed, especially given the other issue in regard to available storage.
I also play online first person shooters and their is absolutely nothing more annoying then the Tv switching modes mid-fight. I agree with you 100% that they are fundamentally flawed altogether.
It's not happening just on this model.. I purchased a Q60r few days ago from costco.. the same thing happens playing my nintendo switch.. I tried diff cables n ports n settings...but one thing fixed it.... I returned this piece of junk back to Costco n got a Sony... No issues now
I have the same problem, but I could solve it by configuring this:
-Disabling the Game Mode
-Option: Color Space -> Native
- Disabling DHCP
- Set Resolution to Max 1080p
- Disabling HDR
And that stop the black screens, but losing a lot of things that improved the gameplay
So your fix was to disable the very mode that people want to use?
DHCP is network related so would have no impact to video. Did you mean HDCP (The security protocol?)
Switching HDR off kind of defeats the purpose of having a HDR TV or a PS4 with HDR support.
The problem is not the TV or HDMI cable. It has something to do with console settings. Had the same issue with q60 series for both PS4 and Switch. On PS4 I had to change the rgb range to YUV420 and for Switch RGB settings from automatic to limited. That solved the issue for me. I' not an expert but if you google the settings I mentioned you will find the steps you need to do.
Thank you Vikycz.
Just set up my new 65'' Samsung Q70 recently, played for hours on the ps4 with no issues at all. Set the switch up just today for the kids and I encounter this game mode issue. First thing I did was change hdmi cables, twice, didn't fix it. Next step is obviously straight to the Internet! I tried your solution and they are almost an hour in and it's not happened once yet!! It was happening every minute previously so it looks to be sorted. Anyone with a Nintendo Switch having this issue, follow his advice! 👍