Not even BIOS? That's not good. Let's see if even TTY works.
At the would-be login screen, try:
If that doesn't work, maybe try a live USB to see if it can even show something (might need to push enter to select an option on boot—best case, when you tried it before, the boot option was defaulting to the USB, but you didn't push enter).
If either of those works, you will definitely have a path to recovery.