get DDU
https://www.wagnardsoft.com/ then using it safemode uninstall your graphics drivers and reinstall the latest nvidia driver
check windows is not the cause through this method.
run as admin [powershell] (type into search bar, when you see it pop up, right click on it and run as admin)
sfc /scannnow
wait till complete
now run (still in powershell)
Dism /Online /Cleanup-Image /RestoreHealth
wait till complete
if either found and fix integrity errors or corruptions, reboot and then repeat both steps again. If you get into a loop greater than three times with finding and fixing errors than you have serious windows issue and need to consider windows reset or fresh install.
My ideas are to rule out other possible causes. The other thing to consider is your power supply, a black screen maybe sign it has issue not the graphics card or could be part of the issue with the graphics card.
Hope you find this of help.