I'm so confused with this random audio issue

Speakers -> Worked via Line OUT for months

Take PC apart and change PSU, assemble PC back.

Speakers - Line OUT detected but can't test Left/Right audio channels, options missing. No AUDIO from speakers unless I select them as default in Pavucontrol or manually assign outputs via Helvum.

Fedora 43 GNOME

How do I get my GNOME audio settings to work again?

This is so random and funny at the same time... yet frustrating because it makes no god damn sense :D