So I have a Macbook Pro 15' Unibody A1286, The screen has gone black but still can faintly be seen by shining a flashlight on the screen. The Apple symbol on the back of the lid is also not lit when it should be! Everything works perfectly when plugged into a external monitor! So I can only assume its a back-lighting issue but cant seem to find the right answer to the problem PLEASE PLEASE PLEASE help