iMac 27" buzzing/hum

Discussion in 'iMac' started by TennisandMusic, Dec 13, 2009.

  1. TennisandMusic

    Joined:
    Aug 26, 2008
    #1
    Anyone with a 27 inch iMac ever hear a faint buzzing or low hum from time to time from the machine? Not sure how else to describe it, it's pretty quiet, but apparent enough to annoy perhaps. Makes it sound more like a home appliance. Anyone? Is this normal for iMac's or would this, yet again, be a cause for switching one out?
     
  2. Davieis macrumors regular

    Joined:
    Aug 20, 2007
    Location:
    Melbourne, AU
    #2
    Does the volume of the buzz increase/decrease when changing the brightness?
     
  3. duky macrumors 6502

    Joined:
    Jun 25, 2007
    Location:
    North Carolina
    #3
    I'm having this issue when on low brightness. Did either of you solve the problem? When the computer display goes to sleep, or when it dims after some time, the buzzing begins. Any ideas? Solutions? Probably going to have to call Apple support tomorrow morning
     
  4. TennisandMusic thread starter Guest

    TennisandMusic

    Joined:
    Aug 26, 2008
    #4
    After two faulty machines, took mine back for a refund.
     
  5. duky macrumors 6502

    Joined:
    Jun 25, 2007
    Location:
    North Carolina
    #5
    Yikes, well I'll speak to support and see if anything comes of it. I'll probably give up pretty easily because it's not that major of an issue though it is annoying when I come home from work to a silent room and hear that humming.
     
  6. mtnDewFTW macrumors 6502a

    Joined:
    Oct 26, 2009
    Location:
    California
    #6
    I had that on my original iMac. Then I called AppleCare and got a new one. I wouldn't say that it's completely quiet now, but not as loud. It might be the fans pushing air.
     
  7. mil098 macrumors newbie

    Joined:
    Apr 9, 2010
    #7
    Yes I got the same buzzing noise.

    Sounds electrical, coming from the top rear of the unit.

    I rang Apple and they have DOA'ed my machine. (1 day old)

    Also I found that my machine would go back to full brightness after either a reboot or a full power down.

    SMC reset, PRAM reset the whole lot has been done, Apple support could not work it out.
     
  8. swee5420 macrumors member

    Joined:
    Feb 10, 2010
  9. duky macrumors 6502

    Joined:
    Jun 25, 2007
    Location:
    North Carolina
    #9
    Looks like I'll just have to live with it. Quite annoying though but I'm hoping I just get over it.
     

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