Previous 1 2 3 Next 622 Replies Latest reply: Jul 26, 2006 7:42 AM by redxk8
BangBangBlah Level 1 (0 points)
My Macbook just randomly turns off sometimes without me doing anything. Then I'll try and boot it back up and it takes me pressing the button about 3 times for it to finally actually boot up. I have it connected to my power supply the whole time, so I'm positive that it's not a power issue. Any advice?

Macbook, Mac OS X (10.4.6)
  • Squibby Level 1 (25 points)
    Go to the apple store and have it replaced. That's what I ended up having to do. Alternatively, you can try the PMU reset procedure:

    Take out the battery and remove the AC adapter, then hold down the power button for 5-10 seconds. Reinsert the battery and reconnect the AC adapter. Power back on.

    This ended up fixing my issue for a day or so before I took it back to the Apple store and had it replaced.
  • Mac Medic ( Level 6 (17,290 points)
    Note the time it shuts down, look at your system logs in your Console application and see if there are any clues in there. It may be thermal related.

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  • nfs2 Level 2 (225 points)
    This seems to be an issue, as there are about 5 posts on this board about it. It has been happening to me too. I suspect a recent software update may have caused it, cause this all seems to be only recent..

    Another possibility is improperly seated ram. Yesterday, on nothing but a hunch, i removed both ram chips and placed them firmly in the opposite slots. I havent had a random shutdown since.

    My gut tells me its software related, but the ram thing might be worth a shot
  • BangBangBlah Level 1 (0 points)
    So should I take it in? Or just call customer support?
  • nfs2 Level 2 (225 points)
    Did you try any of the suggestions mentioned here...?

    I'd say take it in as a last resort.
  • BangBangBlah Level 1 (0 points)
    I don't really trust myself with the RAM and I have no idea which software update it would be.
  • nfs2 Level 2 (225 points)
    The ram is easy, just make sure to follow the instructions on apples website, use plenty of even pressure to place the ram firmly in its slot (dont be afraid, it wont break) and dont forget to tuck in the cushy part when closing the ram door.

    I havent had any shutdowns since doing it and im convinced now it was the ram. If you must, get someone else to replace the ram, just put each in the other slot.
  • BangBangBlah Level 1 (0 points)
    I hate to pester you, but could you please link me to the instructions? Thanks.
  • BangBangBlah Level 1 (0 points)
    Also, would that void my warranty? Opening it up?
  • LAMacbookUser Level 1 (0 points)
    I have a Macbook and this has also happened to me. I took it back to the Apple store where I purchased it and they said tests indicated there was no problem. But it continues to shut down automatically. In fact, it happened again a few minutes ago. It just happens.
  • nfs2 Level 2 (225 points)
    It wont void the warrenty. Its a user-servicable part

    PDF intructions:

    I'm still shutdown-free since messing with the ram
  • gram Level 1 (0 points)
    Mine has started turning off more or less randomly as well. It started a day or two after I installed 10.4.7. It hasn't turned off every day, but today it has done it 7 or 8 times, enough to get me very frustrated... I don't know if it has anything to do with the 10.4.7 update, but since it has only occurred since then it's at least one possibility. What maybe goes against that theory, is that a couple of times when it had shutdown and I then tried to start it again, it simply shut off again without getting so far as to actually turn on the screen. If it's software related, it seems unlikely (though not impossible) that it persists after a shutdown...

    It does seem to happen more often (or only?) when I run this Java program that uses plenty of processing power (100% of one core). I monitored the CPU temperature while waiting for it to shutdown - it usually stayed below 70C so I don't think it's the CPU temperature. The laptop case didn't seem very hot neither, at least I've felt it hotter, so I doubt it's temperature related at all...

    Very annoying!
  • frjps Level 1 (0 points)
    My MB has been doing the same thing since I installed the 10.4.7 update. No problems with shutdowns before. Must be the update.
  • richie.foreman Level 1 (0 points)
    My Macbook has been powering off randomly as well. Alot of times it will get all the way into the OS and I'll fire up safari, and maybe get to my news page (gotta have the morning news!). Then all of the sudden the screen goes pitch black, and the macbook is out cold. Pressing the power button the screen acts like it's going to POST, and then dies and I get the "cd whirly" sound that some people have described. I found out that the mac will keep doing this everytime i press the power button until I unplug the power adapter, and remove the battery, put the battery back in and then power up. I know it's not anything I do, but It would really suck if I took my macbook to the apple store, and it doesnt do it (because sometimes, it wont even do it!). If anyone has any solutions, or know if apple will replace, please keep me in the loop.
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