I RECENT BOUGHT THE CAPTIONED M/B BUT HAVE FOUND THAT THE DVI PORT DOES NOT WORK. IF I USE THE REGULAR VGA SLOT, ALL'S FINE, BUT WHEN I BOOT UP USING THE DVI, THE SYSTEM BLANKS OUT AFTER THE INITIAL POST WITH NO VIDEO BEING SHOWN. IF I UNPLUG THE DVI AND PLUG IN THE VGA CABLE, IT WORKS FINE. WHAT CAN I DO TO ACTIVATE THE DVI?