iMac G4 idle noise - What could it be?

Discussion in 'PowerPC Macs' started by 2contagious, Sep 1, 2010.

  1. macrumors 6502a

    2contagious

    Joined:
    Apr 29, 2008
    Location:
    UK
    #1
    Hi,

    I hear this weird whirring/high frequency noise coming from my iMac G4.

    -It goes away completely when I scroll in safari.
    -It goes from a constant noise to a non-constant (1 sec noise, 1 sec silence, 1 sec noise, 1 sec silence, .....) noise when I use a filter in photoshop for example.

    What could this be? Could this come from the RAM sticks? Maybe I am wrong about this, but I don't think I heard this noise before I put some new RAM from crucial in there :confused:

    see you,
    2c
     
  2. macrumors 68040

    MacHamster68

    Joined:
    Sep 17, 2009
    #2
    first i never have heard about ram modules to make noises so i would exclude them as source of the noise
    the only things i can think of making a high pitched noise are the fan
    and the harddrive and a capacitor can make a high pitched buzzing noise too
     
  3. thread starter macrumors 6502a

    2contagious

    Joined:
    Apr 29, 2008
    Location:
    UK
    #3
    Considering the noise goes away / acts differently when using programs, do you think the most likely cause is the hard drive?
     
  4. macrumors 68040

    MacHamster68

    Joined:
    Sep 17, 2009
    #4
    cant promise its the harddrive as i cant hear the noise and where exactly it comes from even a video made would not indicate really where the noise is coming from , but the easiest way would be to exclude the harddrive if you got a external firewire enclosure and fit the harddrive in there as the iMac can boot from it and run and if then the noise would have moved from inside to the enclosure then its definitely the harddrive

    and i hope you had reapplied everywhere heat compound where it should be after fitting ram inside something that very often gets overlooked


    http://www.youtube.com/watch?v=S72X9Gjy5WM
     

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