I recently acquired a Macbook Pro Unibody 13.3" 2009 model. The computer turns on and works perfectly when attached to an external monitor, but the screen itself will not work. Does anyone know if the problem is just the LCD being broken? Or is there something else that could be wrong with the computer preventing the screen from working? I ask because if just the LCD is damaged, I will buy a replacement LCD and have someone put it in.