Power Mac G5 sleeps randomly during use
Products Affected
Power Mac G5
Some Power Mac G5 computers may go to sleep unexpectedly while you're using them. The computer will operate normally for several minutes, and then go to sleep for no apparent reason. You may be able to wake the computer, but it may go to sleep unexpectedly again. You may also notice that the fans ramp up to a higher speed shortly before the computer sleeps.
If this occurs, update the computer to Mac OS X 10.3.8 or later. If the issue still persists after updating, contact Apple using the phone number listed in your inbox materials.