27" I7 imac high pitch noise, common?

Discussion in 'iMac' started by existe, Sep 8, 2010.

  1. existe macrumors member

    existe

    Joined:
    May 11, 2009
    #1
    I have a new 27" I7 that appears to have the high pitch sound issue if the brightness is not at max or lowest. How "common" is this issue?

    I do not need the perfect iMac (I have some gray banding and the 1TB HD grumbling and it is not a big issue to me) I just wanted to see if this high pitch noise is considered a defect and needs to be fixed/replaced or it is more common than not with the iMac.

    Also read that the grounding plug might have something to do with the noise and that buying a hum reducing device might solve the issue. Thanks
     
  2. Btom macrumors 6502a

    Joined:
    Nov 19, 2009
    #2
    It is unstable power supply issue, endemic for the 21.5"/27" iMacs. It may affect reliability of the PS (not to mention annoy you). Return/replace unit while you still can IMHO.

    Tom B.
     
  3. existe thread starter macrumors member

    existe

    Joined:
    May 11, 2009
    #3
    Called Apple Care and the advisor stated he has never heard of this issue but he did state he could hear the high pitch noise through the phone. He advised I take it back and exchange. road trip time I guess.
     
  4. munckee macrumors 65816

    Joined:
    Oct 27, 2005
    #4
    Crap. I just got my 21.5" yesterday and it has the same issue. Guess it'll be going back as well. :mad:
     
  5. Felias macrumors member

    Joined:
    Jul 29, 2010
    Location:
    Germany
    #5
    It seems around 70% of all iMacs have this issue more or less... Most people don't know what to look for, and it's not loud enough to hear it right away in a lot of cases.

    I personally never have seen an iMac since late 2009 that does not have this issue...
     
  6. munckee macrumors 65816

    Joined:
    Oct 27, 2005
    #6
    Mine was quite noticeable. I debated ignoring it, but I'm going to exchange it and see what I get back.
     

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