Hi,
Just got my DN2820 and run into the same issue out of the box. The bios is not very adaptive to screensizes it seems.
Sometimes I am lucky and the nice NUC logo appears but the moment I go into bios and select my SSD drive (Intel) and save the configuration the screen goes to black and never comes back. The package was sealed and all I did was connecting it to my monitor.
I do notice a couple of things;
1) when pressing power button until i have heard 4 beeps the screen flashes
2) when i press F10 the unit reboots... so it seems to be within the setup menu.. but no display
I have tried to reset the bios using the F9 / F10 sequence and even managed to see the NUC logo twice but it fails more then it works.
This has nothing to do yet with an operating system issue. The SSD disk is blank. Memory is LV.
I have tried to upgrade using blind mode but thats kind of guessing.
Any advice ?