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  1. #1
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    820-3437 3 on off cycles

    Hi all, it's normal for the 820-3437 to do the on off dance for 3 times, but WHY and what controls this. Is the control info in the SMC or the EFI?
    Mark

  2. #2
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    Re: 820-3437 3 on off cycles

    Yes it is normal. I guess it is the EFI's thing as I had a board recently that was never updated to any newer OS than OS X Mountain Lion and the original EFI. This board didn't do 3 fan spins during the boot.

    But after I updated that board to the OS X Yosemite and the EFI also got updated, the board started doing this.

    The exact mechanism why it is doing that is not known to me...

  3. #3
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    Re: 820-3437 3 on off cycles

    Hi Mitch, thank you for getting back to me. This is very interesting. Thank you for your input.
    Mark

 

 

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