Horizontal Rainbow Lines on Startup

When I try to install UbuntuDDE on by brand-new custom-built computer, the installation process works fine, but it does not work correctly when I shut down. When I boot, I get strange rainbow lines on the screen overlapping the motherboard splash screen. Interestingly, Windows installs fine. I’ve also tested a few other Linux distros (namely stock Ubuntu, Debian, Fedora, and Linux Mint) just to see if they would install; None of them would. My parts are:

CPU: Ryzen 9 5950X @ 4GHz
GPU: GeForce GT 730
RAM: 32GB 3600MHz Corsair
SSD: 1TB Sabrent Q4
HDD: 4TB Seagate
MB:  MSI X570-A Pro

Any ideas? Thanks in advance!

Hi @UxuginLinux, Can you please reply with the screenshot of the issue you are getting. It will help to figure out what thing is causing the issue.

I can’t take a screenshot when the OS won’t boot.

@anantamishra Oh my gosh, I’m sorry. I just figured out why you’re not replying: I forgot to mention you! Anyway, I can’t take a screenshot when the OS won’t boot.