sometimes for no reason at all it completely blanks out, and stays off. the computer is on, and makes all of the normal sounds, such as playing itunes songs. when i connect an external monitor everything on the external monitor works correctly, but the ibooks lcd doesn't show anything. any ideas? it's a 1ghz g4 ibook. airport extreme, bluetooth, all orginial stuff. weird thing is that i haven;t installed any new software on it, and it stops during different programs. restarting it, or powering off don't seem to matter. when it does retunr it does whenever it wants. maybe i should call my ibook christine.