Greetings Peter With a search engine (google, etc.) find the UNIX application "applejack" then install it on your boot drive and the cold boot holding down CMD+S This will cause a boot into single user mood at which time you can run applejack. To read how to use applejack type "man applejack" which will take you to the manual page for applejack. Or just enter applejack AUTO reboot, AUTO in caps causes a Deep Clean function. Cheers Harry San Jose, CA ø?ºº?ø,¸¸,ø?ºº?ø,¸¸,ø?ºº?ø,¸¸,ø?º?ø On Feb 17, 2010, at 9:58 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