I am getting this infamous grub error screen. I already tried this solution https://askubuntu.com/questions/929833/how-do-i-boot-my-pc-from-grub/931327#931327 , but I can't find an initrd.img. When I try to boot it says "No video mode detected. Booting in blind mode" and then nothing happens
The problem is that I can't even boot a live disk, because I get the same grub screen there. Usually that is my way of choice to reinstall grub, but this time I really need help with this.