GA-B75N video motherboard problem - NO DVI

[artlion]

I want yo use only video card installed in motherboard. I don't know how to do this Monitor with DVI is always blank, don't bios. I put another card in PCI slot and then everything work on that card, so I checked and in BIOS video from motherboard is always AUTO (even if i change it to IGFX and save after reboot it's once again AUTO). I don't see unrecognized module in device manager - no card video (only my NVIDIA from PCI). Help me I don't know what to do for 5 days. HDMI is dead too. when trying install drivers from web site http://www.gigabyte.pl/products/page/mb/ga-b75nrev_10/download/ or original english I receive error that software will be not installed becouse not meeting requirements !!! What's going on ? I really stucked.

I describe problem here too http://www.fixya.com/support/t24897683-start_dvi_interface_motherboard_video

[absic]

What CPU are you using?
Does it have built in GPU capabilities? Motherboard graphics will only work if you are running a CPU with built in GPU.