UPDATE: I managed to solve the boot issue. For some very odd reason he had a very old and probably wrong dtb. Perhaps something went wrong during the update.
Anyway, I copied over the correct one and system up and running fine now.
I put together an N2 box with emmc for my friend. It is was working fine, while he called me a few days ago that he thinks there was an update and now everything is stuck at Coreelec boot logo. He restarted, nothing.
The box is with me now. It doesn’t go past the logo, just hangs there. I don’t have any backup of his system. Is there a way I can make the emmc bootable? Or access the content of the emmc and put update image there on a Linux machine?
Or the last options: since I can’t access Kodi, is there a way I can make a backup of the emmc Kodi and resotre that on a fresh install?