Switched from AMD to Nvidia, uninstalled drivers, Nvidia card doesn't show anything on the monitor

Hardware Hub GPU
1
Hey everyone. So here's the setup.
 
I have a Radeon HD 6950 1GB
 
I upgraded to a GeForce GTX 760 Hawk 2GB
 
My Radeon 6950 HD works fine. I swapped the cards without uninstalling the drivers first. 
 
Apparently people have problems if they don't uninstall drivers first, so I did that, also ran driver sweeper to help clean leftover files.
 
Now I am running my 760 Hawk. PC boots, no beeps, fans work, the problem is, nothing shows on my screen. Tried HDMI, DVI, AND Display Port (I have 3 monitors), none work. The ONLY thing I see is the error code 62 on my debug LED on my ASRock Z68 Extreme3 GEN3.
 
I have no other PC nearby and no one around me I know with a PC. I don't know if the card is dead or if it's a driver issue.
 
I'm trying to install the Nvidia drivers, but since the PC doesn't boot when the card is installed, I have to take the card outta the slot, and thus cannot install the Nvidia drivers.
 
I was going to run integrated graphics and install the driver on the card while user iGPU, but I can't because when the card is plugged in, iGPU doesn't work even though HDMI cable is in the motherboards port for the iGPU.
 
Please help me out here folks? Any way for me to force the iGPU to kick in instead of the Nvidia card so I can try installing Nvidia drivers first?
2

If you have the capability, try hooking your main monitor up to your onboard graphics via the rear I/O. Once done, download and install the drivers for the nvidia gpu, then shut down and hook everything back up to the nvidia. You should be good. I don't know if this will work, but I know that with the 760 I had, I had to do this because the screen would not display without drivers installed. If it's easier, you could download and install drivers with the AMD card installed, then swap the cards and it should work. Let me know if it does/doesn't. If it doesn't, I don't know what to do.