Windows 10: I enabled HDR on my LG 4K TV and now it doesn't recieve any signal from PC

So I've been using this TV via HDMI as a "second monitor" to watch films and stuff, and today I realized I hadn't enabled HDR for this display even though it supports it. So, I went to display settings, clicked on the TV icon, went to "Windows HD settings" and enabled HDR. Once I enabled it, the TV stopped recieving signal and now the button to enable/disable HDR won't show up.The TV is being "detected" because in Display settings I can see both my monitor and the TV, but the TV icon is way smaller than it should be and when I click on it, it displays no info about resolution or any other thin

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Windows wont display 4k and HDR simultaneously.

I recently got a 4k HDR tv (Samsung UE43NU7100). I connect my PC with a normal HD monitor and the 4k HDR tv. When turning on HDR on my tv the resolution of the 4k tv (3840x2160) gets set back to normal HD (1920x1080) in windows settings. Windows is completely
updated, my AMD Radeon R9 390 8gb graphics card is up to date and supports and displays in 4k when HDR is off. My Xbox one X displays both 4k and HDR perfectly simultaneously. I use a high speed HDMI 2.0 cable. I have no idea why my pc does this and cant find
anything about windows not being able to do 4k and HDR at the same time. It also doesn't work if I only connect the tv instead of the monitor and tv. Any suggestion?

 

Cannot Enable HDR

The HDR option does not appear in 'Display' settings.

I am using:

Intel UHD 630 Integrated Graphics

Cardas HDMI cable

LG 27UK650 Monitor

The LG monitor's HDR works with a Playstation 4 Pro and Cardas HDMI cable.

The LG monitor has no manual HDR setting. It only enters HDR mode when it receives proper signal, first.

Windows 10 only offers HDR setting when it receives proper signal from the display, first.

How can HDR be force-enabled on Windows 10?

 

HDR and WCG will not turn on for 4k 60hz, only 30hz.

Hi there,

I have a gtx 1080ti and a Sony x900e tv. Both support HDR10. However if I set the the refresh rate to 4k @ 60hz via the Nvidia Control Panel Windows 10 won't enable HDR.

If I set it to 30hz, Windows 10 will enable HDR.

My TV is confirmed to be compatible at 4k 60hz HDR while Enhanced Format is enabled.

my set up is 3 monitors (2 24" samsung monitors, and 1 Sony tv which is the main display).

It does work at 1080p @ 60hz for HDR though.

Can anyone help? Thanks!