I just got a Hannsg 28" lcd and I am having problems setting it up. My video card (x850xt) has one vga and one dvi output. I had my old 19" on the vga and the 28" on the dvi and it worked fine. I dont need two monitors so I left the hannsg on the dvi port but now I don't get a signal. It will work with the vga input/output. When I boot, I can only get the boot screen through the vga port. Any ideas why it won't work with the dvi ports?