> I've switched the cable a couple of times. I just switched out the cable and
> used a different one.
>
> Streaky blurry darker screen.
Try booting with Live CD and see if the problem still exists. If the streaks are still there with the live CD then it is likely a hardware issue. If the streaks do not exist with the live CD then it is a software issue. https://www.debian.org/CD/live/
--
⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system ⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org/ ⠈⠳⣄⠀⠀