Ok, this is the strangest thing ever. It has been happening to me for a about a week, I dunno why. Whenever I'm using my macbook (13.3 inch black) with 10.5.8, randomly, without any given warning, the screen will go black. Why? I don't know. It also occurs when I wake it up from sleep and turn on my computer. So now you ask, well how do you use it? Well, the only way I can get the screen get back to life is by holding my Macbook under a lightbulb, and with the screen being very dim, scroll up to sys preferences, press display, and drag the brightness bar up. So you ask yourself, why do that when you can just press the brightness button? As soon as this problem occurs, the brightness button stops working. As soon as I drag the slider, and the computer comes back, it works again. Why is this happening? It' really hard to use my computer, and it's really annoying. I have tried doing the PRAM reset, and the thing where you take the battery out and hold the power button. Please help!