I first connected the fan to the, in earlyer versions disfunctional, USB3 port. I didnt came accross such behavior like u described, but i will check it out. Thanks for the advice
After reading most of this thread again (just to not miss the big breaktrough #install_armbian_to_emmc) without finding a working solution for my box.
If somebody got use for it, i managed to extract the original dtb/dts from emmc of the Box, but compiling them with a 5.0 Kernel didnt work. I just got a black screen/Box didnt start.
Lets hope somebody have better compiling skills and manage to give the box a meaning of life; cause just running Android must be depressing for this nice device 😎😋