> On Nov 29, 2005, at 4:43 PM, Richard Gilmore wrote: > >> My Dual 2.3 G5 shutdown over night all by itself. I usually leave it running >> all the time. Nothing seems to be affected after I turned it back on but why >> would it do that? Is there a log that I can check that would tell me when it >> shutdown and what caused it? Are you plugged into an uninterruptible power supply? If not, is it possible that your power flickered just enough to cause your machine to shut down? I know VCRs and some alarm clocks have a battery so that they don't "blink" after a flicker, so you might not have any other device in the house that would "tell" you if the power went off briefly. Of course, plugging into a UPS means that a flicker wouldn't do that to your Mac... If you *are* plugged into a UPS, how old is it? Is it possible the battery is needing changed? peace, Linda