MacBook pro 2014 stopped booting

[nsrxnst <nsrxnst@bruttocarattere.org>]

while I was at work, chaos happened in my house. my wife cleaned my office, and her nephew locked himself in there.

my Debian install has never been ideal: the GUI is spotty, but the underlying system has always functioned just fine, and to that extent, I have used it as a home server.

it was powered off when I got home.

upon selecting the appropriate option from grub, manually or automatically, it begins the boot process, displays errors too fast to comprehend, and the screen goes to a cursor, then black. repeated power button long-presses seem to be the only thing that brings it back to life, but only so long as I don't try to boot the installed os.

can someone help me troubleshoot this?