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  1. #1

    Member Since
    Jul 05, 2009
    Restart and 3 Beeps - What Gives?
    Hi, all- I think I've done my due diligence and searched the forum, but couldn't find this problem, at least as I have it.

    I have a 15" MBP running OS X 10.5.7. When I go under the apple symbol and attempt to restart, I get a grey screen and 3 loud beeps and a pulsing light in front, which repeat themselves. Consequently, I have to power down by pressing the power button. When I power up again, it seems to come up fine, and everything seems to work. It is only the restart function that is giving me problems. Most 3-beep problems I have seen have to do with installing new memory, which I have not done. I also reset SMC, and this didn't do anything. It seems to me that that this problem began after I downloaded some recent updates, one of which was an SMC Firmware update, but I don't know if there is any correlation.

    Any thoughts? Thanks very much in advance.


  2. #2

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Nambucca Heads Australia
    Imac 27", 3.3GHz, 512 flash storage, 16GB memory, macOS Sierra.
    G'day Todd and welcome to the forums.

    Three beeps indicates either one of:-

    No RAM installed.

    Defective RAM. Installed any new modules?

    Loose RAM. Replaced modules or undone clips?

    RAM slot failure.

    Have a look at this link:-

    macbook makes beeping sound and wont start -

  3. #3

    Member Since
    Jul 05, 2009
    Thanks, Harry. Well, I haven't any new RAM or touched or modified existing. So, I'm thinking the RAM might need to be reseated. But as I'm on travel I don't have the right tools. I'll have to go look for some.



  4. #4

    Member Since
    Nov 30, 2009
    Macbook Pro 13"
    Hi Todd, would you please share your results after reseating your RAM? coz I am having the exact same problem you mentioned.

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