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    Power Converter Buzzing

    Discussion in 'HP' started by bgh10788, Jun 3, 2008.

  1. bgh10788

    bgh10788 Notebook Guru

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    I have a DC to AC adapter that I use in the car. I have used it with no problems with a variety of electric devices. However, when I use it with my laptop cord, the power converter brick buzzes. I did some research, and some people said that buzzing happens because it uses a "modified sine wave" rather than a "pure sine wave."

    The reason I'm worried is that when power supplies or chargers have gone out on me, they make this buzzing noise right before they die. Should I be worried? Is it worth investing in a special DC cord for my computer?
     
    bgh10788, Jun 3, 2008
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  2. Shyster1

    Shyster1 Notebook Nobel Laureate

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    Is the power brick getting hot as well?
     
    Shyster1, Jun 3, 2008
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  3. yehrulz

    yehrulz Notebook Consultant

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    Well, i have an hpdv200, and when its charging, the power brick gets hot and buzzes. You can only hear it if you put your ear up to it.
     
    yehrulz, Jun 3, 2008
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  4. The_Observer

    The_Observer 9262 is the best:)

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    I also have this buzzing.Might be caused by improper grounding.
     
    The_Observer, Jun 3, 2008
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  5. bgh10788

    bgh10788 Notebook Guru

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    It gets hot all the time. Right now it's hot and its properly grounded and not buzzing.

    @Rambo: Your power converter hasn't crapped out on you? How long/often do you use your AC to DC adapter with your laptop?
     
    bgh10788, Jun 3, 2008
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  6. FunnyX

    FunnyX Notebook Consultant

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    I would not recommend using it at all, talk to HP and tell them its not safe and ask for a replacement...

    If its a electrical buzzing noise(kind of like around high voltage lines) then there is most likely a bad cap in the AC Adapter. The reason it sound like a bad cap is the fact that once its grounded there is no noise, thats because all the extra power being held up by the bad cap has somewhere to go.

    *** Do Not Try repairing your ACA. Those caps hold an electrical charge in them long after they are disconnected from the notebook and/or wall, shocks from those can sometimes prove to be fatal. ***
     
    FunnyX, Jun 3, 2008
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