Thread: Black screen appears when I plug in my new graphic card

I bought new graphic card. When I attach my new card and power on the computer screen is black also I attach my old graphics card. I change my power supply but same thing is happen. I am not getting any solution for my problem and need some help for solving that problem.

Uninstall the old graphics card through the device manager. And then reinstall the new card and reboot the system, and then installs the driver for it properly.