I got a pc two months ago, I'm a pc noob and didn't realise that I was playing off my Motherboard GPU instead of my GPU I have installed. So anyway I only realise today while I was cleaning my pc that I never plugged the HDMI cable into my GPU. So I did and i started my pc and it loaded up. I was trying to fix my resolution on the pc to fit the screen and it went black screen. I tried to restart it didn't work, I tried to put in back into the Motherboard GPU and it didn't work. The pc is running and when it does start I can see the Msi logo loaded up and then it goes black screen again. Does anyone know what I did wrong?