My monitor is FullHD+ 1980x1200, I am using VIM3_Ubuntu-xfce-bionic_Linux-4.9_arm64_EMMC_V20191231.7z extracted of course into .img. One previous image worked with no problem.
I tried to power it through DC adapter and through computer (enough power).
Before I uploaded the Xfce versio I have working server version on it and it seems like it does not upload it entirely or rewrite it.
The image was flashed successful both times I tried.