I just bought a g3/500 iBook, and it seems to be working fine except for one thing. Most of the time when I go to turn it on, pressing the Power button won't do anything - no disk noise, no chime, nothing. This is on either battery or ac power. If I press the Reset button, it will then start up normally with no problems. I have also noticed that that sometimes if I shut off the iBook and then plug in the ac adapter, it won't start charging until I press the Reset button, and then it charges normally. I am getting between 1 and 1 1/2 hours on the battery which seems good to me for an old laptop and battery. Does anybody have any ideas on what this could be? I have tried zapping the PRAM and resetting the PMU as described by Apple, and also repairing permissions, all to no avail. It gets very aggravating having to reset all the time. I don't see how it could be anything major, since everything else seems to work just fine.