Before I'd do a system reinstall, I's boot from either you OEM systen disk or another bootable CD/DVD and see if the symtoms persist. If they go away then the problems probably stem from your current install. Ron On Wed, Feb 17, 2010 at 12:06 PM, RICHARD NORTHOUSE <rnorthouse at wi.rr.com> wrote: > Peter, > > I would start by reloading the OS. My two bits worth. > > Rich > > On Feb 17, 2010, at 11:58 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