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  1. #1

    Member Since
    Aug 12, 2008
    Angry fan huumming as loud as jet
    My hardware conf is

    Machine Name: iMac G5
    Machine Model: PowerMac8,2
    CPU Type: PowerPC G5 (3.0)
    Number Of CPUs: 1
    CPU Speed: 1.8 GHz
    L2 Cache (per CPU): 512 KB
    Memory: 512 MB
    Bus Speed: 600 MHz
    Boot ROM Version: 5.2.5f1

    now as soon as i start mac in just few seconds it starts fan on top speed which makes humming sound quite loud what should i do to stop this

  2. #2

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Nambucca Heads Australia
    Imac 27", 3.3GHz, 512 flash storage, 16GB memory, macOS Sierra.
    See if resetting the SMU is any help in controlling the fans:-

  3. #3

    Member Since
    Aug 16, 2008
    Check if there is a large amount of dust at the bottom.
    I think that is what killed my mother board.

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