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  1. #1

    Liam's Avatar
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    New iMac replacement arrived today and...
    ...there is exactly the same sound as the current one.

    If the computer is switched off but the electricity is still on at the wall there is a crackling type of buzzing sort of sound. Stops as soon as I turn the electricity off at the wall.

    What to do from here....

  2. #2
    Try it on a different power outlet.
    DJ Lee

    Watts Up Productions
    www.wattsupproductions.com

  3. #3

    soul60s's Avatar
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    Oct 14, 2006
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    PowerMAC G4 dual1.25gb RAM,160gb HD,250 external HD,ibook G4, 24"iMacIntelCore2Duo,2gb ram, macmini
    Quote Originally Posted by Liam
    ...there is exactly the same sound as the current one.

    If the computer is switched off but the electricity is still on at the wall there is a crackling type of buzzing sort of sound. Stops as soon as I turn the electricity off at the wall.

    What to do from here....
    Is the noise in the computer or in the wall?
    Pay no attention to that thing on the floor, it's just a hairball.


    Great minds have often encountered violent opposition from mediocre minds. - Albert Einstein

  4. #4

    Liam's Avatar
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    Quote Originally Posted by djlee12
    Try it on a different power outlet.
    Already tried that mate. One of the first things I did.

    Quote Originally Posted by soul60s
    Is the noise in the computer or in the wall?
    The machine. As soon as I turn the electricity off at the wall the noise stops.

    The noise isn't loud, and you can only hear it when it's complete silence (In bed etc) or when you have your ear to the back of the machine, but tech support have said there shouldn't be any noise which I don't understand at all.

    They want me to take it all the way to an after sales place which is quite far away from me, and I have no transport to get there so I'm sending the new one back which has just arrived and just keeping this one...

    Will be backing up my Uni work daily incase it decides to die on me though!

  5. #5


    Member Since
    Aug 16, 2006
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    You did try the new power cable and didn't just plug in the old one?

    Sorry, gotta ask dumb questions, seems a huge coincidence that 2 should be the same...

  6. #6

    cazabam's Avatar
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    Jun 06, 2006
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    It sounds like a noisy supply to your house. Any noisy mains AC will make the PSU work harder to clean it up - the noise is probably just the capacitors in the PSU. Have you tried it at a different house (preferably not in the same street)?

  7. #7

    Alexis's Avatar
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    Have you tried running it through a surge protector?

  8. #8

    Liam's Avatar
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    Quote Originally Posted by Jem
    You did try the new power cable and didn't just plug in the old one?

    Sorry, gotta ask dumb questions, seems a huge coincidence that 2 should be the same...
    Yep, tried the new cable mate.

    I've spoke to Apple and I'm just sending the new one back and keeping the current machine.

    Unless they get anyone else complaining of the same thing I can only come to the assumption that it is what you 2 guys above me have suggested - an electricity problem around the house.

    It'll be interesting to see if many others have the same problem as more people buy iMacs. Just have to wait and see I suppose... :mac:

  9. #9

    christm's Avatar
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    Dec 18, 2005
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    ibook g4, imac 2ghz c2d, mbp 2.4ghz c2d - 10.5.1
    try using an adapter that cleans the electricity before it goes to your mac. i dont know what they are called but im sure there out there.

  10. #10


    Member Since
    Oct 10, 2006
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    Specs:
    20in C2D iMac, base model. 30gb Video iPod.
    I used to get exactly the same problem with my PC laptop powerpack - if I plugged it in at my house I'd get the buzzing sound, if I tried it at a friend's house it'd be silent. So theres a good chance it is the power at your house.

  11. #11


    Member Since
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    4,702
    Quote Originally Posted by christm
    try using an adapter that cleans the electricity before it goes to your mac. i dont know what they are called but im sure there out there.
    It's called a Power Conditioner:

    http://www.wisegeek.com/what-is-a-power-conditioner.htm

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