I need a little help with my laptop. I have a 6(ish) month old Packard Bell Easynote LJ71. I have an odd problem with the screen. When anything on screen moves (video, gif, adverts on websites, loading websites, flicking between tab or windows etc...) then I get a load of flickering lines around the moving portion of the screen. As soon as I plug an HDMI cable in though, it all works perfectly. Any ideas?