Is the Quadro 4000 configured for pass-through? If it is, unconfigure it for pass-through.
Is the onboard video adapter configured as the primary output device in the BIOS? If it is not, set it as primary output device.
Is the Quadro 4000 configured for pass-through? If it is, unconfigure it for pass-through.
Is the onboard video adapter configured as the primary output device in the BIOS? If it is not, set it as primary output device.