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Mac laptop The computer is frozen. I Zapped the pram but it did not fix the problem. What else can be done?

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  • Paul Burrows
    Paul Burrows May 11, 2010

    Hi Izzie
    Frozen? Can you let me know at which point it freezes?
    At what stage in the start up does it freeze?

    Such as do you get the start up chime, apple icon and turning gear etc.




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You could reset the PMU (Power Management Unit) by unplugging the computer,removing the battery and hold the power button in for about 10 seconds,then plug in the power supply while still holding the power button,after about 5 seconds of it being plugged in,let go of the power button,then quickly press it again, the computer should power up with the fan running at full speed,if it boots without freezing,shut it down, then turn it back on to reset the fan, and it's fixed, if not,check your warranty status on apple's website and setup an appointment to the genius bar closest to you.

Posted on Feb 08, 2009

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You can try to take off the battery for 24 hours at least, then put it back and switch on

Posted on Feb 04, 2009


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