Hi, I have had some similar problems with my iMac G5. After trying a bunch of things (reboots, cache cleaning, etc.), I reset the PRAM and the power controller and haven't had similar problems since. Norm On Dec 29, 2008, at 7:07 AM, Linda wrote: > On 12/29/08 8:00 AM, Ed Gould wrote: > >> ps: I did install some sort of screen saver but did not like it and >> deleted it. > > Ed, > > I would still look at your Screen Saver/Energy Saver Preference Panel. > Chances are it's set to something different than it used to be > because of > the screensaver you installed. For example, if there's a "Hot > Corner" set up > on the ScreenSaver panel now, you might be inadvertently triggering > that > while using your Mac. Also check your Energy Saver settings to make > sure > that they didn't get changed by the screensaver when you installed it. > Depending on what "some sort" of screensaver is, it might have touched > deeper into your system than you think. > > If there's no resolution there, you might try opening Console and > positioning the window where you can see it, and try to keep an eye > on it to > see if there are strange processes going on just before the screens > go dark. > If nothing else, you can see what "just happened" when you bring the > screens > back up after such an espisode! > > (This is assuming you've ruled out a USB problem by testing your Mac > without > its third-party USB peripherals such as disks and printer and > scanner, and > using your genuine Apple keyboard and mouse.) > > ~Linda > > > _______________________________________________ > X4U mailing list > X4U at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/x4u > > Seven Cent Deals - Great legacy stuff Great Legacy Price > http://www.drbott.com/prod/db.lasso?cat=Seven+Cent+Deal