In this case, please try checking if the DVI cable is properly connected to both the monitor and the graphics card. You can also try using a different DVI cable or a different DVI port on the graphics card to see if it resolves the issue. If that doesn't work, you can try updating the BIOS of your motherboard and updating the drivers for your graphics card. You can also try rolling back to a previous version of the graphics driver that worked fine with your Win10 setup to see if that fixes the issue.
Another thing to try is to boot into Safe Mode and see if the DVI display works there. If it does, it may indicate a conflict with a driver or software program that is causing the issue. You can then try disabling or uninstalling any recently installed drivers or software to see if it resolves the issue.
If none of these solutions work, it may be a hardware issue with the DVI port on the graphics card, and you may need to consider getting a replacement graphics card.
PC Hardware Specialist