Hi all: I encountered a problem this evening with my Powerbook G4 15 inch Powerbook. When I was opening the Powerbook, awakening it from sleep it seemed there seemed to be an abnormally bright flash, then the screen went almost completely blank. Luckily, I was able to see enough to burn my docs to a disc in the event this was a serious problem. It seemed the rest of the laptop was fine. When I restarted the computer, the screen appeared to be fine. I ran Onyx in the event it could clean anything up, and when it was running the screen appeared to go attempt to go to sleep again (although it was not set). Touching the trackpad immediately woke it up without a problem. After restarting after Onyx finished and using it for about a half hour I have not encountered the problem since. Is this a sign of a failing LCD or possibly a bigger problem or just a harmless isolated event? Is it worth trekking over to the Applestore? I'm covered under Applecare. Thanks for shedding any light you can on this situation.