Monitor not detecting GeForce GT 1030

I’m currently running a setup with integrated GeForce GT 1030 graphics alongside a dedicated GeForce GTX 750 Ti card.
Everything was running perfectly fine for about a year, but then out of nowhere, my screen just froze up one day.
Since then, my monitor won't respond at all when I plug it into the dedicated card. It doesn't matter if I use the VGA or the DVI cable; the screen stays black, even though I can still hear all the system sounds once I log into macOS...

The display works totally fine when everything is plugged directly into the integrated graphics.

I've tried just about everything to fix this. I even attempted a fresh install of macOS Monterey, and for about a minute or two, it actually worked before the monitor cut out on me again.

I honestly don't think it's a driver issue. I recently finished installing macOS Monterey while the dedicated card was seated in the machine but with the cables connected to the integrated port. Once the drivers were all set, I shut the computer down, moved the cable over to the GeForce GTX 750 Ti, and the exact same problem happened...

If you're dealing with a laptop and the power supply is cutting out, it'll shut down your GeForce GT 1030...
If it’s a desktop, go ahead and check your BIOS ....... then head into macOS All settings>System>Display to check your setup.

I’m not exactly an expert on this kind of stuff, so if you could walk me through it, I'd really appreciate it. What specifically should I be looking for?
Everything was running perfectly fine for about a year. Every once in a while, though, the computer would just decide to reboot itself out of nowhere...