"You need to restart your computer. Hold down the power button for several seconds or press the Restart button." I get this message everytime I turn on my G4 Powerbook and cannot get past it. Just last night I came home, it was entirely frozen so I just manually turned it off. Now, I can't even get into the Mac OS! I keep getting that screen. I heard this might be a kernal panic, but I don't know what to do. I will turn it on, get the little Apple, then it will go into the Mac OS Startup thing where it starts going across the room, then halfway it goes to the Restart screen. I tried zapping PRAM, and holding C to try to boot from the CD but they are just like NOT working. This is really making me crazy because I must do school work soon. Could someone please attempt to help...! Thanks!