... instead of starting up, my iMac G4 just has a small square in the middle of the screen, with the network symbol in the middle? This happens often. I usually power it all the way down. Sometimes when I start it back up, it is o.k. Other times, instead of starting up, it shows an arrow going in one direction, and another arrow on a circular path. Sometimes it also shows the harddrive icon in the middle of the arrows. Does anyone know what is going on with my computer? Thanks!