Why is the Mac keeps on freezing with black bars on screen
I have NonUnibody Macbook Black Penryn 2.4GHz Intel Core 2 Duo running Lion 10.7.2 and from December of last year (2011) my Macbook keeps on freezing with black bars across the screen. I don't know if it's the heat, the fans, the logic board, because i already tried various scenarios to slim down the choices of possibles problem originators, and nothing.
I did all of the recommended solutions like, reset the PRAM, reset the SMC, but nothing. What gives?
Down i put links to the pictures and video of the problem: