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Macbook randomly sleeps

Posted on 2007-04-04
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Last Modified: 2013-11-24
I have a 13" Macbook that goes to sleep randomly. It would be more precise to say that it "hibernates" randomly, because when the Macbook shows this behavior, pressing the enter key or moving my finger on the trackpad won't wake it up. Additionally, the light on the front of the computer goes off. The only thing that wakes the computer up is closing the laptop entirely, waiting for the light on the front to go back on (it goes into that mode where it fades brighter and dimmer), and re-open the machine. This seems to be more likely to occur when I'm moving the laptop while it's open, but it's also happened occassionally when I've just tapped the machine or even normal typing. I don't recall it ever happening when the computer was completely stationary. Does anybody have some ideas regarding what might be causing this? Thanks.
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Question by:tjgquicken
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mcmarks earned 500 total points
ID: 18851754
I would say you have a hardware problem that needs to be fixed by Apple.  Try calling AppleCare or taking it to the Genius Bar at your local Apple Store.  Sorry I can't give you a better answer than that.
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Expert Comment

by:Andrew Duffy
ID: 18856461
First you should ensure you have the latest software updates, in particular Firmware updates - there are some bug fixes for this kind of behaviour.

Also, try resetting the SMC:

http://docs.info.apple.com/article.html?artnum=303319

If you experience no improvements then it would seem your Macbook has been struck down by a hardware problem, as mcmarks suggested. There is a known issue:

http://paulstamatiou.com/2006/09/04/yay-my-macbook-randomly-shuts-down/
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by:tjgquicken
ID: 18857066
I took the computer to the Apple Genius Bar and they diagnosed it as something wrong with the LCD display. Total pain to fix, though.
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