27" iMac static like noise

Discussion in 'iMac' started by spin498, May 20, 2015.

  1. spin498 macrumors member

    spin498

    Joined:
    Nov 24, 2010
    Location:
    I move around
    #1
    My iMac makes these intermittent noises, like static. Seems to occur only when surfing the net using Firefox. Initially I thought it was my external speakers and had planned to replace them. However, I went on an extended vacation and powered everything off before I left. When i returned and the noise started again I realized I hadn't turned those speakers back on. Is it static? Or something Firefox is generating?
     
  2. T'hain Esh Kelch macrumors 601

    T'hain Esh Kelch

    Joined:
    Aug 5, 2001
    Location:
    Denmark
  3. spin498 thread starter macrumors member

    spin498

    Joined:
    Nov 24, 2010
    Location:
    I move around
    #3
    I'm using the cord that came with the Mac. I get the same noise with Safari, but not as loud and It's not effected by the volume control.
     
  4. T'hain Esh Kelch macrumors 601

    T'hain Esh Kelch

    Joined:
    Aug 5, 2001
    Location:
    Denmark
    #4
    But is it properly grounded?
     

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