[MANswers]

I have this problem.
The screen goes blank when i try switching to full screen, and in windowed mode its ok.
However there is my observation. In windowed mode the screen is at 60Hz, and in full screen it changes to 24Hz.
Is that the reason? If this is it, how can i make sure it doesnt change? Is this something i need to set under my GPU (Radeon's software), or Kodi itself?

[PatK]

The EDID information sent by your panel might be incorrect, you need to enter the catalyst control and go to the HDTV support and ensure you have the 60hz resolutions you want ticked. Also check the properties in that same sub menu, it should give max refresh and that should be over 60. Usually on the panels web site, they make available some sort of EDID monitor spec you can custom load.

BTW: how do you know the screen is now 24hz if it's black?