Have you seen this before (system clock error)

Discussion in 'Mac Basics and Help' started by mzfire, Apr 30, 2008.

  1. mzfire macrumors newbie

    Apr 30, 2008
    We had a power outage last night and when we came in this morning we booted the two G4's it gave a system clock error, something like "the system clock is set before March 21, 2001 this may cause problems with other applications" we were concern that the battery may have failed in both Macs. Has anyone else had this problem? Or have any suggestion if we should be looking at the battery or something else?
  2. Cameront9 macrumors 6502a


    Aug 6, 2006
    This happens when the PRAM has been zapped. It's nothing to be concerned with unless this happens everytime you restart the Mac (which would indeed indicated that the button battery was failing).
  3. tersono macrumors 68000


    Jan 18, 2005
    Yes, it's 99.9% likely that it's your PRAM batteries. They're not expensive and very easy to fit.

    While the system is running it will update the internal clock from Apple's time server, but with a flat battery it won't hold that info when you shut down. If you leave your systems running, it ain't a big deal, but otherwise it's probably worth getting replacements.

    You don't mention which G4 you have, but IIRC most, if not all, use a 3.6v lithium half-AA sized battery. A quick google should find several suppliers.
  4. mzfire thread starter macrumors newbie

    Apr 30, 2008
    Wow Thank you for your quick response

    Wow you guys are great!!!!!:):)
    The system clock was set back to Dec 31, 1969....the epoch date of the first Unix.....wow.
    I think we are going to replace the battery the systems are about 8 years old. Thanks so much for your help!!!!!


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