no hdmi port,
2x DVI, 2x mini dp, dvi-dsub adapter, dvi-hdmi adapter
my current resolution is 1280x768, which is working fine for the dvi-dsub adapter.
when I boot my computer with dvi-hdmi plugged in, it displays the windows loading screen (with the green loading bar), in a very low resolution. I'm guessing 640x480. the screen goes blank when the user selection screen appears
The screen goes blank either because the display can't handle the resolution it's set at(too high or too low), or something else.