I have an HP a6000 desktop computer (consumer-grade pc) and the video went out on it. I've tried different monitors. The motherboard integrated video controller has two outputs, VGA and DVI. I've tried both, and with both when the monitor is plugged in it just goes black, I can't even access the monitor menu.
My first thought was "bad video controller" so I put in a PCI video card with a DVI out. When I connect my monitor to the video card, same result! I thought this was strange.
Am I dealing with a bad motherboard? Or is there some kind of manual switch on the mobo to disable the integrated video controller? I can't access the BIOS because the only thing that ever comes on screen is black.