Hi guys just finished the build today asrock z97 extreme 4 board with i5 4690k and the pc works great except when i try to boot bios, it goes to black screen and curser now i know its meant to be a corrupted bios install but i re updated the bios to 1.50 and it still does it any ideas? also i read that if i unplug the hdmi lead and go vga it works wth?