The tip from Rich Northouse was a good suggestion. Your G4 detects a power failure and as soon as there is power it restarts. That could be your problem. Rich, where is the setting or preference for auto restart? I had the same problem with my G4 1GHz AGP under Mac OS 10.3.9. I would do a normal log out and shut down and a few minutes later it would restart on its one. After the shut down and before the restart I would turn off the power strip to make sure it would not come back alive. I never did figure out what was causing the problem. The good news is since going to OSX 10.4 the problem is history. It works normal now. Dick On 5/14/05 3:58 PM, "g4-request at listserver.themacintoshguy.com" <g4-request at listserver.themacintoshguy.com> wrote: > Date: Sat, 14 May 2005 15:55:51 -0500 > From: rich northouse <rnorthouse at wi.rr.com> > Subject: Re: [G4] G4 Startup > To: "A place to discuss Apple's G4 computers." > <g4 at listserver.themacintoshguy.com> > Message-ID: <ca430a696283dfed240538d0fda1060d at wi.rr.com> > Content-Type: text/plain; charset="us-ascii" > > Rich, > > You can set up a Mac to automatically power up, in case of power > failure, etc.. Often used when the machine is in a critical application > such as a server. Thats my guess. > > another rich > > On May 14, 2005, at 1:08 PM, Richard Dion wrote: > >> I understand what you are saying, If I shutdown using the drop down >> menu like everyone else, it comes to a stop the light goes off and >> then it starts a reboot without touching anything. It's as though you >> choose the "Restart" option. I was using the on/off button under the >> speaker as a last resort. I've been using Macs for the last ten years >> and never ran across this before. >> >> Hope someone has the answer ! >>