I could start it! Funny thing: it started loading the old installation of CE that remains in the NAND. It disregarded the SDcard content.
So I understand that it used the bootloader from the sdcard then loaded directly into the main partition of the NAND, right?
Anyway, just rebooted the device and now I can’t start it again
If I can start it again and it loads CE, is there any method that I can use from SSH to recover it definitely?