hi i have a black macbok, 2 or 3 years old. when i open the screen, the screen is just black, cant see anything, and have to open and close, and keep pushing back and forth, for it to come on, and then its off again. basically really sensitive, to on and off, seems like the sensor inside is faulty? when the screen is black, you can see like about 1% of whats on the screen, and so it seems to be there, just the screen is in sleep mode or something? basically the screen is acting like the macbook is in sleep mode, when the screen window is wide open.... any ideas? could i fix this? a few weeks ago, it was really bad. i took the battery out, back in......then it started to work again. now its hit and miss. thanks for any help given.