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    noisy 90W adapter

    Discussion in 'Lenovo' started by sciencefair, Jul 8, 2012.

  1. sciencefair

    sciencefair Notebook Consultant

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    I recently bought a secondhand adapter (from a seller on another thinkpad forum with plenty of positive feedback so I don't have reason to believe it's fake) and I just noticed some noises I hear that I assumed came from my laptop's hard drive are actually electrical noises coming from inside the adapter itself. When I scroll using the middle button and the trackpoint, there is a very distinct noise (similar to the noise made from accessing a large file on my hard drive, albeit louder) that I can hear from 4-5 feet away. Is this normal and should I worry about the power supply exploding?
     
    sciencefair, Jul 8, 2012
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  2. Pintu

    Pintu Notebook Consultant

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    That noise is, unfortunately, normal for some PSUs. Even a brandnew 90W PSU that came with a T410 made exactly the noise that you describe.
     
    Pintu, Jul 9, 2012
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  3. iCrazyNoob

    iCrazyNoob Notebook Guru

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    I have a 90W adapter but do not hear any noise from it unless my ear is right on the adapter casing. So you might want to ask the seller if that's a normal condition, if he think that's abnormal arrange a replacement.

    4-5 feet would be a pretty loud electrical noise considering for a supposedly silent PSU brick.
     
    iCrazyNoob, Jul 9, 2012
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