Video card conflict.
Hello, I've been sifting through the video card questions on the forums and none had the solution to my particular issue so I had to pose my own.
I installed an ATI Radeon HD 2400 video card on my pc, a Gateway GT4010. I uninstalled the previous onboard video card's (NVidia 6100) drivers and I disabled it in the device manager. I installed the other video card and it had been functioning well, but recently, when the pc boots, the screen will remain black. Any help will greatly be appreciated, and thank you for your time reading this.