No Display on my PC; need system disk

So I had no display on my computer.
I switched the GPU to another PCI slot and instead of going to power saving mode, the screen stayed black and after a few minutes, a red screen popped up telling me to insert the system disk.
I can't leave it here cause it blocks the SATA ports.
Should I swap out the motherboard?
- GA-Z68MA-D2H-B3.
- Intel i5 2500k.
- EVGA GTX 570.
- Raidmax 850W PSU.
- Corsair Vengeance 8 GB of Ram.
