The white port is a dms 59 connector which uses a cable to get dual vga or dual dvi ports. In bios the video card with the DMS-59 port is most likely set to be the default card and its output is what is displaying the bios information, to change this you'll need a dms 59 cable, plug a monitor into the dms 59 cable and change the primary video adapter to the onboard port then the bios will be displayed on the vga port. Another option would be to remove the video card and the bios will default back to the integrated card as the primary video adapter.
