Hey, I had a old white macbook for about 3 years now its been working fine ever since but one day when i started it up, the screen flickered and went black, but my macbook was still on i could tell by the status light and when i held down the shut of button it shut off. I tried power resets and taking out and putting back in my RAM a hundred times and it worked once the Macbook booted and the screen was on and it was running fine till i put it to sleep then the whole black screen started again please help. Thanks, Steven