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    mitchsc's Avatar
    mitchsc Posts: 802, Reputation: 7
    Senior Member
    		  
    #1

    Jun 21, 2009, 04:10 PM
    Power Supply Fan Not Running
    This may be a really basic question, but I can't seem to find an answer with an online search.

    RE: Dell Dimension 8100 Desktop with proprietary power supply (I think the pwr supply P/N is 3E466 but not sure)

    My wife got an error message right after boot up that said "Fan System Not Detected".

    I checked it out and no more error messages, BUT... I noticed the power supply fan is not running when cold. (I didn't run the PC very long for fear of overheating the power supply).

    I believe I heard the fan speed is variable depending on temperature.?

    2 Questions please:

    1) Is it normal for the power supply fan to be completely off when cold?

    2) What does the error message mean above?

    Thanks...
    mitchsc's Avatar
    mitchsc Posts: 802, Reputation: 7
    Senior Member
    		  
    #2

    Jun 21, 2009, 04:19 PM

    SORRY. My mistake.

    It's the CPU fan that is not running.

    Same questions apply.

    Thank you...
    JBeaucaire's Avatar
    JBeaucaire Posts: 5,426, Reputation: 997
    Software Expert
    		  
    #3

    Jun 21, 2009, 05:14 PM

    1) You can test if the fan is faulty (or the MOBO) by trying it in another computer, if you wish, but perhaps a waste of time. It would be interesting to know.

    2) Buy a replacement fan LOCALLY if possible and swap it out. If it works normally, it's a cheap and quick win. However, if it doesn't fire up, you want to be able to return it and swap it for...

    3)... a replacement fan that bypasses the MOBO and has an adapter that can plug into a power source right off the power supply. You may lose some of the cool utilities that tell you how the fan is doing, but these replacement power-supply fans are typically more rugged anyway, so it's not really that big a loss.
    mitchsc's Avatar
    mitchsc Posts: 802, Reputation: 7
    Senior Member
    		  
    #4

    Jun 21, 2009, 05:28 PM

    Good to know. Thanks.

    Just found problem. Stupid really.

    Loose pins on motherboard connector. Tightened with needle nose. Problem solved.
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