Air 11" 2011 keyboard backlight noise

Discussion in 'MacBook Air' started by julioromano, Aug 4, 2011.

  1. julioromano macrumors newbie

    Aug 4, 2011
    Hello folks,
    I was just wondering if you are hearing the same high pitch buzz I hear when the keyboard backlight is set to its lowest brightness (only one "pip" ).

    Of course it is barely audible, but when in a closed room with no other electronic appliances running it is a bit annoying.

    Turning the backlight on and off repeatedly might help in "locating" the noise.

    Any opinions are appreciated,
  2. kim2272 macrumors regular


    Jul 23, 2010
    Sunshine State
    I wish I could help you. I have tinnitus, constant ringing in the ears. So if my MacBook air were doing that I'd probably mistake it with my tinnitus. I have never heard of this problem but if it is bothering you I would definitely call AppleCare. Good luck!
  3. ZipZap macrumors 603

    Dec 14, 2007
    I think the backlight is LED and Fiber Optics based so there can be no noise.
  4. julioromano thread starter macrumors newbie

    Aug 4, 2011
    I don't think it's coming from the LEDs, it might be the whirring of the Boost Converter used to generate the voltage that drives the LEDs. Sometimes it can fall into the human audible spectrum.
  5. julioromano thread starter macrumors newbie

    Aug 4, 2011

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