New iMac makes buzzing sound

Discussion in 'iMac' started by Arne, Mar 13, 2009.

  1. Arne macrumors regular

    Joined:
    May 14, 2006
    Location:
    Germany
    #1
    Hello,

    my new iMac (2,93 ghz, 4GB, nvidia 130, 1TB storage) makes a buzzing sound. It does not stop if I lift it from the desk, so it is not vibrations that cause my desk to do the sound. I suspect the HDD or the fans. Should I be worried?

    Arne
     
  2. stujmac26 macrumors regular

    Joined:
    Mar 4, 2009
    #2
    I would be worried - your iMac should be quiet as a mouse.

    Do other electricals buzz when plugged into the same plug socket? Might be worth checking if you don't know - my TV buzzes if the dimmer switch for the lights in the same room is down too low...
     
  3. Appleness macrumors member

    Joined:
    Feb 26, 2009
    #3
    So does mine (3,06 GHz GT-130)
    I have got a head ache.....
     
  4. jmj80 macrumors newbie

    Joined:
    Mar 12, 2009
    #4
    stujmac might be on to something, electrical interference is a possibility. all i can hear on my new imac is airflow and the slight clicking of the hdd when active. i couldnt imagine a fan bearing bad already, but anythings possible.
     
  5. Arne thread starter macrumors regular

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    May 14, 2006
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    Germany
    #5
    I'm not shure about electrival interference, since there is no sound if it is in standby-mode and the sound doesn't kick in until like a second after the iMac has woken up.

    I have heard about some diagnostics tool, that allows the fun to run at full power for some time to solve problems. do you think this might help? if yes, how do I start it?

    Thanks for your help!
     
  6. RDoe macrumors member

    Joined:
    Mar 13, 2009
    #6
    me too

    I have it too. It becomes less obvious when lifting up the imac, but it is still there. I think it is the HDD.
    OH jeh, I've got one deadpixel, but it is so tiny and in the upper left corner, that I missed it the first 15min.
    The main thing is I find it a bit to high compared to my ACD. Needs lowering.
     
  7. Arne thread starter macrumors regular

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    May 14, 2006
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    Germany
    #7
    hm sucks... I'll probably never get an apple product without any flaws -.-
     
  8. DannySmurf macrumors 6502a

    Joined:
    Jul 7, 2005
    #8
    What kind of buzzing is it, exactly? Like a fly? Or is it more of an electrical whine, like the first-gen MBPs had?
     
  9. Arne thread starter macrumors regular

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    May 14, 2006
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    Germany
    #9
    neither of both. I know the sound from my external harddrive when I place it on my desk. When I lift it however, the noise disappears. I think its vibrations. It also helps to put something soft underneath it.
    It must be the harddrive...
     
  10. RDoe macrumors member

    Joined:
    Mar 13, 2009
    #10
    Yep I think that also. It is the HDD. With music on it is barely noticeable. I still have a small gradient issue in my screen. Will see the next days if it will even out or something or ... well ... do not want to think about sending it back.
    It is bright though.. .. jeesz
     
  11. Arne thread starter macrumors regular

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    May 14, 2006
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    Germany
    #11
    well I will see how much it annoys me over the weekend. If it annoys me too much I think I will send it back. I have spend an aweful lot of money on this machine...
     
  12. edgew8 macrumors regular

    edgew8

    Joined:
    Dec 8, 2008
    #12
    Its the fans, the bearing aren't bad because they have no bearings.

    I have a description of a possible solution here>http://forums.macrumors.com/showthread.php?t=654353
    because I had the same problem with my iMac. Your best bet is to see if Apple will replace your fans with quiet ones, but they probably wont and just call your problem "normal operation and not a problem"
     
  13. Appleness macrumors member

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    Feb 26, 2009
    #13
    How quiet should it be really? The buzz, though not that loud, is constant. I can feel the vibration even just placing my hands on the desk where the iMac is placed. Is that normal? Should I get used to it?
     
  14. Mike in Kansas macrumors 6502a

    Mike in Kansas

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    Location:
    Metro Kansas City
    #14
    I feel NOTHING when placing my hands next to or on my 24"/2.8. In normal operation I can't even HEAR the HDD nor the fans.

    You may want to download and install one of those fan control apps, and then crank your fans up to see if the buzzing gets worse. That will at least help you isolate the problem.

    If it were me, off to the Apple store I would go.
     
  15. Dont Hurt Me macrumors 603

    Dont Hurt Me

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    Location:
    Yahooville S.C.
    #15
    Buzzing sound can be related to display brightness, see if it changes by decreasing brightness a little.
     
  16. cocky jeremy macrumors 68040

    cocky jeremy

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    Jul 12, 2008
    Location:
    Columbus, OH
    #16
    I just got mine and it does it a little bit. Only when opening applications and stuff. i think it might be the HDD working.
     
  17. Simon1966 macrumors regular

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    May 23, 2006
    Location:
    United Kingdom
    #17
    I have the same spec as the original poster and mine is silent. :)

    I think you should be contacting Apple support and getting a replacement.
     
  18. mac.andy macrumors member

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    Feb 22, 2009
    #18
    I will be interested to know what Apple has to say / how it resolves these problems. Seems to me Rev A of the new 2009 iMac is troublesome - at best.
     
  19. Arne thread starter macrumors regular

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    May 14, 2006
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    Germany
    #19
    I already spoke to Apple care. The person I spoke to had me install the OS X updates and made me Hold CMD+ALT+P+T while the iMac restarted 3 times in a row. It didn't help. I'm taking it to a certified store (I'm in germany, we don't have (many) Apple Stores) on wednesday. I will insist that they exchange the HDD. Here in germany law has it, that you can send back anything you ordered online or by phone within the first two weeks without paying any fees. That can't be what apple wants so I hope they just exchange the HDD...

    BTW: I downloaded smcFanControl and let the Fans spin on maximum, and that didn't have any impact on the buzzing, so it's not the fans.

    Thanks for your help guys
     
  20. Appleness macrumors member

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    Feb 26, 2009
    #20
    if it is because of the HDD, is this buzz all we can expect, or could it bring any worse issue in the long term?

    I ask it because I am considering to "live" with that buzz, as far as I hate even thinking of returning my iMac and having to wait weeks for a new one...
     
  21. RDoe macrumors member

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    Mar 13, 2009
    #21
    Replacement?

    So anybody have a replacement? I think I'll try a replacement, I also got a slight gradient. I did not see any gradient in some store where the 24" were displayed. I'll take the gamble.
     
  22. Arne thread starter macrumors regular

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    May 14, 2006
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    Germany
    #22
    I took it in. Today the guy called for the second time, they can't hear it. Maybe something changed due to the transport or so. I will pick it up on friday.
     
  23. Arne thread starter macrumors regular

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    May 14, 2006
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    Germany
    #23
    I got it back, nothing changed. I guess I will have to live with that. The next time I buy a computer I will seriously consider buying something else than apple. My macbook has this whine, my iMac makes this noise... come on...
     
  24. Davieis macrumors regular

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    Aug 20, 2007
    Location:
    Melbourne, AU
    #24
    My friend who just bought a 24" BTO iMac claims to have the same issue.
     
  25. RDoe macrumors member

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    Mar 13, 2009
    #25
    Put it on the ground, seriously!

    Well I'm convinced this is vibration through the iMac stand into the desk. At least that is what it is over here. I placed the iMac on the ground and another desk and no vibration. I have a nice looking Ikea desk, but the wood (some sort triplex) of the desk itself is relatively thin. So I guess that with the RPMs of the disk the desk resonates with it due to its own frequency (eigenfrequentie).
     

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