Black screen with static white underscore on boot after changed BIOS settings

Luke56

Reputable
Dec 21, 2014
24
0
4,510
I was trying to install Windows 7 from a CD onto my new SSD but the installer said it couldn't be installed onto a GPT partition. I looked it up and I saw changing boot options in BIOS to UEFI only could work. Well, I did that, tried to boot and it only gave me a black screen with a static underscore that jumps onto my second monitor and starts blinking. Cant boot from my HDD with Win 10 either, same screen. Can't access BIOS since keyboard and mouse don't work.