MB has one DVI port, Graphics card has two.
I’d have to hunt: I MIGHT still have a monitor with a DVI input.
Don’t spend time trying to get a video output before you replace the power supply. I have been working with and on computers for over 40 years and I have a 99.9 percent success rate with solving computer problems. I am so good that I have a full time job doing technical support and I am in high demand. I laugh at Geek Squad. I am a Nerd. Nerds rule! I spent over 15 minutes on your problem and if I was billing you it would be 250 dollars for a one hour minimum. I would order a compatible or identical power supply from Amazon or eBay if I was at all interested in success with your problem. ThenI would charge you another 250 dollars to install it, plus whatever the power supply cost. You’re welcome.
Would the BIOS have a choice for video output?
They do make DVI/HDMI adapters.