Yay, Ron! Good for you! Persistence has paid off. Do you happen to have MS Office on the machine? I suspect in my paranoid mind that something there is secretly attacking my machine. Gary Ron Reames wrote: > Well I've just spent about an hour with Apple's tech support and made > some real progress. When the help person realized all the things I've > tried, he bumped my case up to a higher level techie. > To make a long story shot, we've eliminated problems with 10.2.5, my > hard drive, my third party RAM. > We got the noise to go away by booting into Safe Mode. > > What this means, is that some application is causing the problem and > I've got to start sleuthing there. > One suspect is Xsounds, a haxie by Unsanity. I'm going to contact them > and see if anyone else is reporting the problem, then take it off my > system and see if the clicking goes away. > > > Ron