TV UHD Flickering black screen? Can't work it out, please help!

[Pendry22]

Hi everyone, I have a 50 inch UE50MU6120K.

I have recently purchased an Xbox One X to make use of the 4K gaming, when playing any game or even on the home Xbox screen, the signal flickers on and off, I have tried 3 different HDMI cables and it makes no difference. I tried it on the LG TV downstairs and there are no issues at all, which narrows it down to the TV. Is there some sort of setting which is causing this?

I have a video to show the problem too if anyone can help?

https://youtu.be/ELg2t1xZm8k

[RozvM]

Did you tried all of the HDMI ports?

Also... Are you using a High-Speed HDMI cable?

I suspect, that the LG television runs on a lower resolution, so there is a bottleneck because of the wire. Xbox One can output 4K at 60 Hz, which only HDMI version 1.3 and above supports.

(I reccomend 2.0 and later, because of the pixel encoding support.)