Can you see at least GRUB, or nothing at all?
If you can see GRUB I would try booting with the “nosplash” kernel option, which causes video drivers to be loaded later.
This is a temporary fix, as it might cause other issues, but if it makes the screen work it will be a step in the right direction.
I’m definitely no expert so I might not be the best person to try and help, but if you want to try having a 1 on 1 chat to fix it, feel free to send me a PM.