PSU makes a noise when scrolling up and down webpages

Discussion in 'MacBook Air' started by Artmuzz, Dec 26, 2011.

  1. Artmuzz macrumors 6502

    Jun 17, 2008
    I have noticed a problem with my MBA 11inch power supply when I scroll up and down webpages. When I scroll up and down using the trackpad I hear a slight buzzing noise from the power supply unit. Is this normal? Please advise.

    I am using my MBA on my bed with the power supply unit next to it.
  2. wrinkster22 macrumors 68030


    Jun 11, 2011
    my macbook air charger makes this noise also. It is normal.
  3. superego macrumors member

    Jun 24, 2009
    If you're using unearthed power adapter, I believe that is normal. Use earthed and the problem should go away. If it happens even on battery, it's not normal and you should take your laptop back. [Edit: I read first that the sound was coming from your laptop. I'm not familiar with the issue where the charger is making the noise.]
  4. Artmuzz thread starter macrumors 6502

    Jun 17, 2008
    The sound isn't coming from my MBA. it is coming from the PSU when I scroll up and down on the trackpad. I am glad its normal as I really wasn't wanting the hassle of taking it back for a repair.

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