Samsung HG40EA790MS: YCC 4:2:2

Nvm, did research and answered my own question

I forgot to check the YCC 4:2:2 option in Video Modes.

If anyone has problems regarding HDR on the TV, try to activate the YCC !

I have the same pronlem with a samsung UE49MU7000T. I’ve tried all HDMI enabled ports on my TV, different HDMI high speed cables and all the possible combinations of color depth. Even YCC 4:2:2 don’t help. Now my console is on the way to the repair lab.

Ok here's how to put console into troubleshooting display mode.

• Eject any disc from the console
• On the console, press and hold the Xbox button for five seconds
• Press and hold the Xbox button and the Eject button until you hear a beep to turn on the console. Don’t let go until the second beep occurs.
• Note that this action boots your console in low-resolution mode. Go to Settings to reset this setting.

This will allow you to reset your display options. Hope it helps

Have you tried toggling YCC 4:2:2 on and off?