by PcTestCard.com » Tue Aug 23, 2011 8:48 am
Try get to the Bios and see if the screen line problem still there.
If so, it is not the driver issue.
Check the video connection and reseat the video card(if dedicated)
also clean the video card lead pins and the video card slot.
Check and reseat the RAM as well.
Sometimes, poor RAM connection may cause the screen problem as well.
Hope this suggestion helps!
Bill