If you want to see a similar problem, go to this youtube video:
Ok my sister has a Dell Inspiron 1545. (bought in about august 2010) It has developed a problem. When you turn it on, the screen goes white and then it fades and shows the 'windows did not shut down successfully message' but it is covered in white lines and is in mirror-writing. I think this is a problem with the graphics card but could someone please confirm this?