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  1. #1


    Member Since
    Oct 20, 2009
    Posts
    5
    Loud Crackling Noise From MBP [Sound Clip Included]
    Hi All,

    I am new to this forum and would really appreciate your help on this issue.

    My Macbook Pro 15" [2 GHz Intel Core Duo, OS X 10.5.7, 1 GB 667 MHz DDR2 SDRAM] makes a loud crackling, chainsaw-like noise from the upper left part of the keyboard. I think it maybe the fan but I'm not sure.

    I've attached an audio clip of the noise:

    20091009 175820.m4a - 3.78MB

    OR (in case the first one doesn't work)

    http://dl007.zshare.net/download/3ce...9%20175820.m4a

    How worried should I be? Your help will be greatly appreciated.

    Best,
    DyausPita

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,803
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    I couldn't get either one of those files to download - it seems the site wants you to register or wait all day for the download to begin. Not good.

    However, from your description of the noise and location, it does appear to be fan related. Fan could be loose or the bearings shot. If the machine is still under warranty (Apple care) take it on in. If not, you can try opening it yourself and examine the fan. There are two fans in your MBP so make sure it's the right one.

    Regards.

  3. #3


    Member Since
    Oct 20, 2009
    Posts
    5
    chscag,

    Thanks for your reply. The site doesn't require you to register. You click 'Download' and a link appears in 60 secs.

  4. #4

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,803
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    Yeah, I waited - no download. Anyway, you might want to check the fans in your MBP. If the machine is out of warranty, open it up and take a look. Go to this website for instructions:

    iFixit: Apple Mac, MacBook, iPod, and iPhone Repair Parts

    Regards.

  5. #5


    Member Since
    Oct 20, 2009
    Posts
    5
    Thanks. I will look into that right away.

  6. #6

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Location
    Texas, where else?
    Posts
    26,480
    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    Was able to download - Definitely a fan.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  7. #7


    Member Since
    Oct 20, 2009
    Posts
    5
    Thanks bobtomay.

    My warranty expired two years ago. Is there anything I can do before opening the laptop up to know more about this problem? Does the sound correspond to a particular problem with the fan?

    Best,
    dyaus

  8. #8

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Location
    Texas, where else?
    Posts
    26,480
    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    Could just need cleaning.

    My own practice, once a fan starts making noises has been to replace it. They're cheap. Too cheap to worry about what is wrong with it.

    Check out the ifixit.com link chscag posted above. They have parts and great step by step instructions for most of the parts they carry.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  9. #9

    deus_ex_machina's Avatar
    Member Since
    Aug 06, 2004
    Location
    Tejas
    Posts
    1,713
    Specs:
    2GHz Mac Mini 2GB RAM 160GB 10.6.2 | MDD DP 1.25GHz G4 1.5GB RAM 10.4.11 | 233MHz iMac G3 10.3.9
    Quote Originally Posted by dyaus View Post
    Thanks bobtomay.

    My warranty expired two years ago. Is there anything I can do before opening the laptop up to know more about this problem? Does the sound correspond to a particular problem with the fan?

    Best,
    dyaus
    Research how to take your laptop apart! No warranty means you get to become well-aquainted with its inner workings.

    But seriously - most problems with fans involve replacement.

  10. #10


    Member Since
    Oct 20, 2009
    Posts
    5
    UPDATE:

    So I can definitely trace the sound to the Left Fan. I installed smcFanControl and noticed that the Left Fan RPM drops to about 600-700 while the Right Fan RPM remains unchanged.

    This lasts for a minute or so and the Left Fan RPM suddenly clicks back to normal speeds. There is an annoying buzz from the Left fan but the 'chainsaw' goes away.

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