My Macbook (black) 2.4 GHz (early 2008) running 10.6.7. freezes after 3-4 min. on wakeup from sleep mode. This problem started about two weeks ago. After been woken from sleep mode I have about 3-4 min. of use before the computer freezes, so there's no respond from neither the track pad nor the keyboard (not even caps lock turns on the light when pressed), the screen is kept on, but nothing but the power button in the corner works. I don't even get the spinning rainbow wheel or anything - just freezing What to do?!!