Screen keeps turning black

Hey there. Just finished installing KDE Plasma using archinstall. Once inside, I changed the display settings to adjust my monitor’s refresh rate, resolution…etc, and when applying and then clicking on another settings section, it prompted “changes were made: apply, discard, cancel”, to which I applied changes. And suddenly, the screen turned black, occassionally turning back on when moving my mouse just to turn black once again.

The only way I can now see the screen is by moving my mouse and waiting a few seconds (which not always works). I really don’t want to reinstall, so if someone can help me it would be great.