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    power adapter hissing?

    Discussion in 'Apple and Mac OS X' started by g3kko, Sep 1, 2007.

  1. g3kko

    g3kko Notebook Enthusiast

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    hey guys,

    I was wondering if its normal for the power brick to be hissing when its connected to a wall outlet? The noise isn't too bad, I jut want to know if its harmful in anyway.
     
    g3kko, Sep 1, 2007
    #1
  2. cashmonee

    cashmonee Notebook Virtuoso NBR Reviewer

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    The power from that outlet may not be very clean. Are you using the ground plug or the little 2 prong? The ground plug should always be used, especially for plugging straight into the wall.
     
    cashmonee, Sep 1, 2007
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  3. g3kko

    g3kko Notebook Enthusiast

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    is the ground plug the one with the 3 prongs? then yes. I have it connected to a surge protector, and this is the first time I've ever heard this sound on any of my laptop power bricks.
     
    g3kko, Sep 1, 2007
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  4. spookoman

    spookoman Notebook Consultant

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    mine doesn't
     
    spookoman, Sep 1, 2007
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  5. cashmonee

    cashmonee Notebook Virtuoso NBR Reviewer

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    Try a different surge protector. If the problem persists, contact Apple.
     
    cashmonee, Sep 1, 2007
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  6. hollownail

    hollownail Individual 11

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    Is your MBP/MB older? There was a handful of bad power bricks. But most of them had melting ends (the part that plugs into the laptop).
    Mine melted and went up in smoke in the middle of class :-D
     
    hollownail, Sep 1, 2007
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  7. g3kko

    g3kko Notebook Enthusiast

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    lol. I got my MBP on Friday. I think its my electricity at home, because the hissing noticeably reduced when I used a higher quality surge protector.
     
    g3kko, Sep 2, 2007
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  8. hollownail

    hollownail Individual 11

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    Do you have anything else plugged into that surge protector? If so, try having just the MBP plugged in and see if that changes the hiss.

    Also, have you tried a different circuit?
     
    hollownail, Sep 2, 2007
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  9. queshy

    queshy Notebook Deity NBR Reviewer

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    mine hisses sometimes. also when charging my fans rev up near the beginning for some reason...whatever.
     
    queshy, Sep 2, 2007
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