Cubox I1-300-D: initial Armbian flash screen, then "no signal"

Hi, My Solidrun Cubox I1-300-D has been running Armbian for quite some time (Samsung EVO SD card). However, I tried to update/upgrade, and my version was non-supported anymore (19.04?), so time for a fresh new image. I've tried three times (download image from https://www.armbian.com/cubox-i/, sha256 check, burn image with etcher, inspect file structure (looks good), and boot), but each time this happens: "Armbian universal operating system" + text ("Executing

We are using up2date Solidrun U-boot which automatically detects the board and select proper DT. If this is not done properly, you need to force loading it. Editing /boot/armbianEnv.txt or boot.cmd/scr and changing / forcing correct DT for your board. I am affraid this is probably the only way. Most likely this is the problem ... My Cubox i4 works without a problem and that is the only one I have.