2nd monitor is detected, however is not displaying anything.

[adryn]

I have my main monitor, connected to the GPU, and is displaying fine.
The secondary monitor is connected to the on-board MOBO GPU, and is detected in device manager, but only showing a black screen.

CPU
Intel Core i7 3770K @ 3.50GHz
Ivy Bridge 22nm Technology
RAM
16.0GB Dual-Channel DDR3 @ 666MHz (9-9-9-24)
Motherboard
ASRock Z77 Extreme4 (CPUSocket)
Graphics
E390i-A1 (1920x1080@60Hz)
SONY TV (1280x768@59Hz)
Intel HD Graphics 4000 (ASRock) This is what isn't displaying
3072MB ATI AMD Radeon HD 7900 Series (Gigabyte)

 

[jkhoward]

You may be able to right-click the desktop, select screen resolution. Click on the disabled monitor and from the drop down box select extend these displays.

 

[dominirican3351]

DId you disable the onboard graphics card check your bios to see

 

[Caleb Hale]

I have my main monitor, connected to the GPU, and is displaying fine.
The secondary monitor is connected to the on-board MOBO GPU, and is detected in device manager, but only showing a black screen.

You cannot use the on-board GPU with a dedicated card at the same time. The only way to use multiple GPU's that I'm aware of is in SLI or Crossfire configuration.

 

[dominirican3351]

You cannot use the on-board GPU with a dedicated card at the same time. The only way to use multiple GPU's that I'm aware of is in SLI or Crossfire configuration.

That is incorrect you can run multiple monitors off different gpus so you can use onboard with amd or nvidia or even nvidia with amd. The monitors will use whichever gpu they are connected to for processing power.

 

[adryn]

Also to clarify, I had this set up working, then after some cleaning it stopped working. I checked to make sure things weren't unplugged however. I'll try a few of these suggestions.