My girlfriend dropped my DS lite a few weeks ago. Everything seemed fine until last week the bottom ds screen started flickering. The flickering goes on for a few minutes then it goes to a white screen. The top screen still works fine and I can still pay some games (as long as they only use the top screen). Does anyone have any idea what could be wrong with it? I have a Y wing screwdriver so I can take it apart. (it's out of warrenty).