Powerbook shut down every time i unplug it.

Discussion in 'Macintosh Computers' started by adelembre, May 19, 2004.

  1. adelembre macrumors newbie

    May 19, 2004
    Recently my powerbook started to shut down every time i unplug it. And then, when i switch it back on the date is always on the 1st of january 1970. I dont know what to do???
  2. Darwin macrumors 65816


    Jun 2, 2003
    round the corner
    Does the battery show as being fully charged?

    There is a small battery on the motherboard, I remember when one of our computers lost sense of time it was usually that battery which needed replacing, maybe this is connected with your shutdowns, don't know in what way though, sorry :(

    But you might want to try resetting the PMU and zapping the PRAM
  3. tjwett macrumors 68000


    May 6, 2002
    Brooklyn, NYC
    well the date and time resetting can be an indication of a dead logic board battery (not the battery that runs the machine). you could also have a dead battery(the one that DOES run the machine) or perhaps it isn't seated properly. make a quick visit to the Apple Store and they'll test your battery, power supply, and machine in a few minutes. most likely you'll walk out with a free replacement part and 10 minutes missing from your life. not too big a deal.
  4. gekko513 macrumors 603


    Oct 16, 2003
    I think Darwin is on to something. There is probably an emergency battery in the powerbook that is supposed to keep things going (and remember the time) when external power and main battery fails. It may very well be that this emergency battery is needed for a brief moment when the PB switches from external power to internal battery.
  5. JFreak macrumors 68040


    Jul 11, 2003
    Tampere, Finland
    this is exactly the case - powerbooks' battery behaves just like UPS, meaning that when the battery is full, it is left alone and the power doesn't go through the battery.

    (usually the power goes always through the battery to make things simpler and easier to build. but that slowly destroys batteries.)
  6. adelembre thread starter macrumors newbie

    May 19, 2004
    O, thanks all but now what am i suppose to do?
    I can only switch on the PB if its pluged so does that mean it has to be pluged constantly ? :mad:
  7. wrldwzrd89 macrumors G5


    Jun 6, 2003
    Solon, OH
    Until you figure out why your battery's acting up, you'll have no other choice but to leave it plugged in. Do you have an Apple Store or place that diagnoses/fixes Apple computers near you? If you do, I'd take the PowerBook there, explain the problem you're having, and see if the folks there can get it fixed.

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