So, my 1.5GHz 12" PowerBook that is just over a year old has crashed 3 times this week for no apparent reason. I will be in the middle of doing something and the screen will go black (backlight still on) and any audio playing will skip (like a skipped CD) until I hold the power button down to shut it off. Then, When I turn it on again I get the chime and it just sits there until I force it to shut off again. Turning it on the second time works as normal. I looked in console.log and system.log, but there is NOTHING at the time of the crash in either -- just the log from startup and stuff from hours before. And, conveniently, it's just a few months after the warranty has expired and I didn't get Applecare. Can anyone diagnose this? Thanks.