I was using my powerbook and all of a sudden it went to sleep. I woke it up but it went back to sleep. I got it to wake up for a bit and then it went back to sleep and is still sleeping (it's been about 20mins). I noticed the fans were running alot and it was very hot to the touch. Is this normal for when the computer gets hot? I had it do this before and an apple tech had me clear some stuff in openfirmware. Any ideas?