HELP!: Annoying High Pitched Noise

Discussion in 'iMac' started by andrewdale, Nov 14, 2008.

  1. andrewdale macrumors 6502a

    Joined:
    Jan 28, 2008
    Location:
    Memphis, TN
    #1
    Hey everyone,

    I usually sit over in the MBP area, since that's my computer. However, my wife uses a 24" iMac for her photography. Specs are:

    24" iMac
    Dual 2.8GHz Intel Extreme
    4GB RAM (Corsair)
    320GB HDD
    ATI RadeonHD2600

    For quite a few months, she's started having a strange problem. The computer will start making a VERY high-pitched noise that appears to be coming from the top-back of the computer. It is not through the speakers, as muting doesn't get rid of it.

    It's happened when she's browsing the internet and listening to iTunes. It's happened when she's loading 20 RAW/NEF files into Photoshop. So, it's not very consistent as far as processor load.

    Last time it started happening. I checked her fan speeds and temps to see if anything jumped out at me, and nothing was out of the ordinary. The only thing I haven't checked is whether the HDD is writing at the time, but it's not a consistent noise like I expect a HDD would be.

    Here's a link to a video that I snagged with Photobooth just so I could have proof when we take it to the Apple store. You'll notice that she changes the volume while it's happening.

    http://www.amydalephotography.com/online_uploads/iMac.mov

    If ANYONE can help me with this, that would be great. Not only is it hindering her work, but I also don't want anything to happen and us not be prepared. Last thing we need is to lose that computer. Luckily we keep backups.

    PLEASE -- if you can help, please let me know. I've searched around, but could never find anything conclusive.
     
  2. andrewdale thread starter macrumors 6502a

    Joined:
    Jan 28, 2008
    Location:
    Memphis, TN
    #2
    Anyone?

    Please.

    Just bumping it in case someone didn't see it. Really needing answers if they are available.
     
  3. MBHockey macrumors 68040

    MBHockey

    Joined:
    Oct 4, 2003
    Location:
    New York
    #3
    Yikes. I have no idea, but certainly bring it in and show them that video.
     
  4. chadrob30 macrumors 6502

    chadrob30

    Joined:
    Nov 13, 2007
    Location:
    In front of my Mac.
    #4
    Could it be a fan going out? Sounds like metal on metal, like a bearing...good luck with it...
     
  5. andrewdale thread starter macrumors 6502a

    Joined:
    Jan 28, 2008
    Location:
    Memphis, TN
    #5
    But, from what I can tell, the fans look like they're near the bottom of the iMac. Is that incorrect?
     
  6. MBHockey macrumors 68040

    MBHockey

    Joined:
    Oct 4, 2003
    Location:
    New York
    #6
    Generally, any time you hear mechanical noises (aside from fans spinning up or normal hard disk activity noises) it means something is wrong with the hardware. You really should lug it to the Genius Bar ASAP.
     

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