Do I need to replace my new motherboard? I get this flashing line on the LCD screen sometimes. It is a dark color, goes all the way across the screen, and appears to be about 1 pixel high. It is weird, the flashing line will move up and down down the screen as you scroll. I noticed this right away when I installed my new motherboard last week. I did update the BIOS and all drivers, no improvement. I am using the DVI port, did not try the HDMI port yet.