hope someone could help me...my ibook just started to act strangely. i had it sleeping in my bag...i open it up again and it's not starting up. i press the power button and the CD/DVD drive kicks up like it's ready to start...and then the fans start blasting and i'm left with a loud ibook with nothing on screen. nothing. nothing stops it except removing the battery/cutting the power. i can't get any of the standard startup key combinations to work either. it's a g4 1ghz ibook with 768mb ram. i've been running it as is since last october with no problems...haven't dropped it or anything, so i don't know what's wrong. any help would be appreciated. thanks.