Original post by: originalmachead ,
There's a number of possible reasons see this [http://www.ifixit.com/Answers/View/39341/Why+is+the+Display+white+but+an+external+Monitor+works+fine|similar Question]. Since moving the display which moves the cables I'm leaning toward a nicked, damaged or loose display data cable. Connecting it to an external monitor would rule out any logic board or VGC(VPU) problem if the monitor stays steady as the laptop acts up. ''If this answer is acceptable '''please remember to return and mark it'''.''