Take a look here if you have an Intel iMac

Discussion in 'Buying Tips and Advice' started by mac000, May 4, 2006.

  1. mac000 macrumors 6502a

    Joined:
    Sep 6, 2005
    #1
    I am wondering from other users if your Intel iMac has a high pitch noise when it is in "sleep" or "shut down"....

    On the back left side of my imac near the vent, there is a rather high pitch noise that sounds whenever teh computer is shut off or in sleep. I am debating whether to take it in to be checked out. Its not a huge deal, but if its a start to some hardware failure I would like to know.

    Anyone else hear this noise? :confused: :confused:
     
  2. eji macrumors 6502

    eji

    Joined:
    Jun 8, 2004
    Location:
    Inland Empire
    #2
    I actually have an AC power supply for my Zaurus PDA that does this. If the PDA is plugged in and on, no whine; if the PDA is plugged in but shut off (and its battery is fully charged), it's a real high-pitched whine that, once you notice it's there, will drive you nuts.

    Are you in Europe? I ask because I am, and the high-pitched whine goes away when I'm in the US on 120v current.

    In other words, it could be a safe but annoying issue with the auto-switching power supply.
     
  3. truz macrumors 6502a

    truz

    Joined:
    Jan 1, 2006
    Location:
    Florida
    #3
    If you don't have the recommended voltage going to your mac it could be causing issues. Try buying a UPS backup, you can get a belkin 550va on buy.com for $50 USD.
     
  4. Nermal Moderator

    Nermal

    Staff Member

    Joined:
    Dec 7, 2002
    Location:
    New Zealand
    #4
    Mine does that if my iPod is plugged in (and possibly only when it's charging).
     
  5. balamw Moderator

    balamw

    Staff Member

    Joined:
    Aug 16, 2005
    Location:
    New England
    #5
    I've noticed it in the early morning and only if I put my head very close to the iMac, and agree with the assessment that it's probably the switching power supply. I'm quite sensitive to high pitched whines, I can tell when a CRT/TV is on but displaying a blank picture, so it doesn't seem too bad that I don't dwell on it with the Intel iMac.

    B
     
  6. pilotError macrumors 68020

    pilotError

    Joined:
    Apr 12, 2006
    Location:
    Long Island
    #6
    iMac

    I have a 20" iMac and haven't noticed any noise whatsoever.

    I can barely hear the Hard Drive, but that CD is a different story!

    Mike...
     
  7. FFTT macrumors 68030

    FFTT

    Joined:
    Apr 17, 2004
    Location:
    A Stoned Throw From Ground Zero
    #7
    I agree that it's a good idea to use a high quality power conditioner with any
    sensitive electronics.

    When I check voltage before installing an electric meter, the readings vary
    quite a bit.

    The readings can be off by as many as 3-8 volts depending on the cable and the distance to the transformer.
     
  8. witness macrumors 6502

    Joined:
    Apr 7, 2005
    Location:
    Austria
    #8
    I haven't noticed any strange noises with my intel iMac, though I occasionally get some backlight flicker.
     
  9. emmakins macrumors newbie

    Joined:
    May 9, 2006
    #9
    Apparently this is "normal"

    Guys, my 20" imac does this and it drives me bonkers cos I can hear it at night.

    I took into the apple shop and the technician said this is normal and that all electrical devices do this. (Which is utter rubbish-my last computer was dead silent whenever it was off.)

    I was annoyed that I had to lug the thing back and be told this.:mad: He said that power was still being used by the device when it's turned off or asleep and that what you can hear. Then why don't I hear it when it's on and awake?
     
  10. imacintel macrumors 68000

    Joined:
    Mar 12, 2006
    #10

    I hear it. It is nnoying(my imac is in my bedroom.
     
  11. wordmunger macrumors 603

    wordmunger

    Joined:
    Sep 3, 2003
    Location:
    North Carolina
    #11
    I don't hear anything. Could be my 39-year-old ears, though.
     
  12. imacintel macrumors 68000

    Joined:
    Mar 12, 2006
    #12

    It is because of the fans. You know how projectors cool off when you're finished using it? It is like that. It is a CPU fan, but not the main one. It is a small fan. There is also one by the Hard Disk.:)
     
  13. Artful Dodger macrumors 68020

    Artful Dodger

    Joined:
    May 28, 2004
    Location:
    In a false sense of reality...My Mind!
    #13
    My 20" iMac is quiet no matter what so maybe I'm lucky or it is working just fine. The sound (fans) only goes up if I'm doing a heavy load in Flash but not enough to bother me and really, iTunes takes care of any sound that I would complain about when doing so.
     

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