Why is screen going black when I extend display?

[5530 - David Stephenson]

Hello, I am having a problem that just started today after booting up my computer. I have 3 monitor display, but for some reason the middle display is black despite bringing on and the computer detecting. I have done enough to know it is not the montior because when I change display settings to duplicate displays the montior is fine. It is only when I change the display options to extend these displays. I have tried changing the ports in the GPU around, checked to make sure my drivers are updated, and ruled out the idea that the monitor has gone bad. Please if anyone has any ideas or options

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