Blank screen on monitor

Hello, I use latest open elec with kodi 16 and I’ve got a problem with my monitor. When I plug it to the TV with hdmi everything works fine, but with monitor and hdmi + dvi adapter it won’t boot. Only what I see is open elec splash screen and then it goes black and kodi splash screen doesn’t show up. I tried several resolutions, but it’s still black. Can you please give me some advice how to fix it? Maybe some config lines to add. Thank you