Hi mtekin8,
Have you tried to check if a cable have a connector pin damaged?
Check if a connector on video card, where the cable plug in, are ok or damaged?
Check if the cable are inserted in good place, not in Onboard Video, other video card by exemple.
Remove a graphics card, check if in a PCI slot, if he have a dust, scrap of paper or any small things.
Use a Flash Light, if needed.
Check if a graphic card are good inserted on slot.
Check if your Monitor have a front light ON (when is plugged on the wall)...
After plugged monitor, Ligh On,
Check when you holding the cable (from video card) very near to the place where it enters the monitor (back side on Monitor)
if by move the cable from left to right slowly or Up-down cable.... if there is change, anything you see on the screen?
Sometime the cable are damaged at this place near back side on Monitor.
Have you another Monitor, by a neighbor, friend, work colleague ...
to see if the problem is the graphics card or Monitor.
Same thing if you have another graphics card, even very old card on PCI or PCI Express slots.
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Bios
Check if in Bios, your setting for Initial Display First is set to PEG. PciExpressGraphics ... card.
Gloup_Gloup