Mac keeps shutting down and resetting clock?

Discussion in 'MacBook Pro' started by Deblerg, Sep 5, 2014.

  1. Deblerg macrumors newbie

    Joined:
    Sep 5, 2014
    #1
    My ~3 year old MacBook Pro has done this three times in the past two days. It'll be running fine, usually just typing on a word document or browsing cat videos on the internet, so nothing out of the ordinary. Then, even if it's fully charged, it'll shut down as though it's run out of battery. I have to plug it back in to turn it on again.
    As soon as it turns back on, I'll find that the clock has reset itself to December 31, 2000 at 7:03pm.
    Nothing's happened to it lately; I haven't downloaded anything new and there haven't been any physical mishaps either. Unless it's absorbed the time vortex without telling me, I have no idea what's going on! Any suggestions?
     
  2. Brian Y macrumors 68040

    Joined:
    Oct 21, 2012
    #2
    First thing, try an SMC reset. Power off, plug in, then hold:

    LEFT: Shift, Ctrl, alt, cmd

    and press power. The magsafe should flash green, then power the machine on as normal.

    If that doesn't work, it will be one of two things - the battery, or the logic board. Resetting the time happens when there's a complete loss of power - so it's either the battery cutting out, or probably a blown cap on the logic board.
     
  3. SarcasticJoe macrumors 6502a

    SarcasticJoe

    Joined:
    Nov 5, 2013
    Location:
    Finland
    #3
    Never seen a mac reset the system clock, but every time I've seen a Windows machine do that it's been the CMOS battery (called the "PRAM battery" in macs) on the motherboard ether running out or just going bad. However the shutdowns and the fact it's a mac lead me to believe it might be something considerably worse than something fixable by replacing a battery that costs a few dollars.

    You see they actually got rid of the CMOS/PRAM battery in the unibody machines because those machines are instead directly connected to the (main) battery at all times. This basically eliminates the possibility that it's just a bad battery that costs a few dollars to replace.

    So my recommendation would be to take in for a checkup at a specialist and if you've previously worked with electronics, take the bottom panel off to see if something is blown or leaking because chances are this might be the case.
     
  4. gomz24 macrumors newbie

    Joined:
    Sep 7, 2014
    #4
    Mac keeps shutting down and resetting clock

    I have the same issue but i have changed the battery completely still as soon as i remove the adaptor it goes off completely.then again i have to reset the time and everything. Please suggest what to do next....:(

    I have macbook pro 13 inch early 2011.....!!
     

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