Black screen when going to full screen

Hello all,

I am setting up an NES PC build and using Kodi with retroarch on Windows 7 x64.

I have tried this with using Kodi and with just using retroarch and I get the same result.

If I launch to fullscreen mode, or even if I start in windowed and toggle to fullscreen, the video disappears and there is just a black screen. If I go back to windowed mode, everything is fine.

I have played around with the retroarch.cfg and retroarch-phoenix.exe, but still no luck. Any suggestions?