Hey cookie,
Did you try check if the monitors, computers, or surgeprotector is properly grounded? (sometimes the surge protector will tell you if its properly gounded)
Maybe try to reset the CMOS or take out the videocard, and put it back in. Maybe it was knocked loose a little from taking the monitor cable out of maybe if your foot hit the computer and it got loose.
Try to contact the manufacturer and request a warranty. Sometimes they are nice to fix your videocard if its out of warranty by a little..
Just some suggestions, thanks paul