The screen on my 15" 1.67GHz Powerbook has been acting funny. Whenever I close the computer and let it sleep, the screen doesn't come on after being closed for about half an hour. The screen just randomly does this and it does it frequently enough as well. I've already done hardware tests that show the computer is fine, but the screen problem remains. I've had previously problems with this computer before and this is my second logic board. I was thinking about going to the local Apple Store and let them take a look at it. I was hoping you guys could give me a hand first in finding out what's wrong. Thanks
