We have just moved offices and when it came to setting up one of our computers one of the monitors won't work.
The computer in question has windows 7 and a geforce 7300 LE and GT 430 graphics cards enabling 3 monitors. At the current situation 2 monitors work using the geforce 7300 LE but the third off the GT 430 won't.
I've updated and reinstalled the drivers which should work (I read I need the same driver for both) and that doesn't work. I've removed the GT 430 and blew off any dust I could see with one of those blowing devices.
I've tested the monitor itself and it's cable and that seems ok.
Windows 7 doesn't say any hardware problems and before the move it was fine - it also tells me all 3 monitors are there (Nvidia's software says the same)
Does anyone have any further ideas - all I can think of is remove the other graphics card and see if it will work of on it's own but that won't fix the problem.
On another note we also had a problem with an xp machine, (3 monitors again) this gets weirder - all the monitors were working and then one day one decided not to work - again, tried reinstalling drivers but no dice. Tried replacing the cable but nothing changed.
What could be the problem, and how can it be fixed?