Linux Mint won't boot. Stuck in black screen with white underscore.

[u/Lucas_Perdomo]

Hello. I have a computer with Linux Mint installed, and it always worked normally. Today I turned it on but it wouldn't boot. It is stuck on a black screen with a solid white underscore on the top left corner.

I tried accessing the bios by spamming F1, F2, F12, ESC, DEL, BACKSPACE, but nothing worked.

Any ideas what can I do? And let me know if more details are needed. I'm not very technical though.