small buzzing (SSD activity) when the air is plugged

Discussion in 'MacBook Air' started by sonico7, May 13, 2012.

  1. sonico7 macrumors newbie

    Joined:
    Apr 29, 2011
    #1
    HI im have a 2011 MBA 13.

    I Want to know if It is normal to hear a little hum or buzz (t sounds like a spinning hard disk, o a shaver) every time I scroll a page on Safari and also when open a APP or loading something (like a SDD have activity) .I understand that SSD would not have to do it because it has no moving parts

    When I unplug the Magsafe of the air disappears completely :confused: only appear when the air is plugged .

    The small hum/buzz comes close to the ESC key near magsafe connector

    Thanks in advance
     
  2. orangezorki macrumors 6502a

    Joined:
    Aug 30, 2006
    #2
    Sounds like the power management bit of the computer - may be nothing, but I would take it to your local Apple store if it is still in warranty.

    David
     
  3. JD92 macrumors 6502a

    JD92

    Joined:
    Apr 14, 2005
    #3
    I remember this exact same thing happened on my old 2006 MacBook. Never did figure out the cause, but it never really bothered me.
     
  4. calvol macrumors 6502a

    Joined:
    Feb 3, 2011
    #4
    This is probably the voltage regulator on the logic board. It is probably a "switcher" VR as opposed to a "linear" VR. Switchers are cheaper, but their weakness is that they make a humming noise under load. Was your battery full? I would try to see if you hear it with the battery fully charged and with the mag-safe plugged in.
     
  5. pieuk macrumors member

    Joined:
    Dec 25, 2011
    #5
    ive had this and wondered what it was also. you can only really hear it at night when everything is super quiet. its so quiet you wouldnt even know it was there tbh
     
  6. sonico7, May 14, 2012
    Last edited: May 14, 2012

    sonico7 thread starter macrumors newbie

    Joined:
    Apr 29, 2011
    #6
    Thanks for the answers!

    With the battery fully charged and with the mag-safe plugged NO hum/buzz issues :rolleyes: only be hear when charging and the SSD have activity why? this is normal?.
     
  7. orangezorki macrumors 6502a

    Joined:
    Aug 30, 2006
    #7
    I guess when the battery is charging and the computer under load, the component is user the greatest stress.
     

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