Hi, I have a MacBook and have a problem - wondering if any of you have had it. I don't usually shut down the computer, I just close the lid and put it to sleep. When I open the lid and it wakes up, the screen will light up, but then go black for a couple seconds, then light up again, then go black, etc. After a few cycles it stays lit for good. This doesn't happen every time I wake up the computer but maybe about 75% of the time. I'm wondering if it's worth bringing to the Apple Store to get fixed....then again, I've been meaning to get a new white cover anyway (since I have the orange discoloration). Aaargh!