Hello Peter, Try booting of an external drive, if the problem goes away, then you need to do a clean install of 10.3.9. Help this helps, Bruce R. Nakamura On Feb 17, 2010, at 7:58 AM, Peter Webster wrote: > I have an old Sawtooth G4, 500GHz AGP graphics, 1 gig of SDRAM, a > scssi drive, running Mac OS 10.3.9, hooked up to an external Maxtor > USB drive and a FireWire LaCie, with a 17" Studio display. > > When I click on "shutdown" the icons disappear, the monitor dims, > the whirling bars rotate, the screen goes dark, and the CPU does > not shut down. > > I have to push the power button on the CPU itself to get it to shut > down. > > This has happened occasionally in the past, but is now happening > almost constantly. > > I have run Disk Utility, verified and repaired, thinking something > had been corrupted, and also ran Tech Tool Express, all report > everything is OK, but still, this problem. > > Any suggestions as to how to rectify this would be appreciated. > > I use this old desktop a lot, like the way it is set up, like OS > 10.3.9 on it, and would hate to have it pooch out. > > Thank you in advance! > > PMW > > > > -- > peter m. webster > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4