im sorry is it reply to my message?...

i'll try to install new OS tomorrow

here is the dump of original bios from acer 871 (kindred) which is linked to the school.
i've tried to follow this instruction - [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/103339-acer-c771-chromebook-enrollment-unlock-needed"]badcaps:103339[/URL]
the topic starter confirms that it is not bootable after this try, but i thought i'm gonna be lucky 😁

so what i need now:
remove enterprise enrollment
get the laptop booting again....

i did the same, and also got the Acer 713 bricked completely 🤣
the LED flashes in blue, so i guess it is now in bootloop...