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Thread: Motherboard fan noise in speakers

  1. #1
    Constant Bitrate JayKaye's Avatar
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    Arrow Motherboard fan noise in speakers

    Hi all,

    I can hear the whirring of my CPU fan through my speakers. I thought it may be something else in the car but the same sound is coming through the TV speakers when I plug the machine into my TV at home.

    I have grounded the case in the car with a fairly decent sized cable, however I didnt think this would work considering the sound is also being heard at home through the TV speakers.

    Any help on this one pls?

  2. #2
    Constant Bitrate JayKaye's Avatar
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    any thoughts on this one?

  3. #3
    Maximum Bitrate owenjh's Avatar
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    I don't know too much about it, but if you can try another fan, or get one of those zalman coolers that dont require a fan. That could be an idea, or just try another fan.
    CarComputer Status: New Car & Broken (Motherboard Fried)
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  4. #4
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    Try an external sound card.

  5. #5
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    Are you using DC-DC or an Inverter?

    Either way try powering the fan from somewhere else. If it is connected to a MB header try a molex one instread or from the 12 volt line to the DC-DC/inverter.

    luck
    TruckinMP3
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  6. #6
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    try another fan? maybe yours is faulty?
    ( does unplugging fan fix problem )
    www.digital-car.co.uk - The UK CarPC Forum

  7. #7
    Constant Bitrate JayKaye's Avatar
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    im running a DC-DC. ill try running the fan from another power source.
    the fan isnt faulty, its a brand new one.

    im looking to buy an external sound card, but dont have the money as yet

  8. #8
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    ive had many a faulty new fan - if the suppresion inside isn't correctly fitted it will cause you no end of problems...
    James
    www.digital-car.co.uk - The UK CarPC Forum

  9. #9
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    I don't think it is your fan. One easy way to check is to put your finger on the center of the fan and alter the rotation speed slightly by breaking it with your finger. Does the pitch of the sound change when you do that? If it does, then it is your fan. If, not then you have other things going on.

    Oh yeah: Be carefull. Count your fingers before and after the test

  10. #10
    Constant Bitrate JayKaye's Avatar
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    Quote Originally Posted by NewTechFool
    I don't think it is your fan. One easy way to check is to put your finger on the center of the fan and alter the rotation speed slightly by breaking it with your finger. Does the pitch of the sound change when you do that? If it does, then it is your fan. If, not then you have other things going on.

    Oh yeah: Be carefull. Count your fingers before and after the test
    Thnx for the tip
    Ill do that and see what happens. Ill post results here.

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