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    Fan not powering down

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by Vladk1000, Aug 26, 2008.

  1. Vladk1000

    Vladk1000 Notebook Consultant

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    I posted this question in the HP dv5t thread but no one could give me an answer so I thought I would try asking it here, because someone with a different notebook might have the solution.

    Does anyone know why the fan doesn't power down when I unplug my notebook from the AC? The temperatures are cool (32C CPU and 45C GPU.) I don't know if I had this problem when I got my notebook because I never used the battery until today. The fan is spinning at the same speed when it's on AC power as when I'm using the battery. I think this kills battery life, but I haven't measured it yet. Is there anything I can do to fix this problem?
     
    Vladk1000, Aug 26, 2008
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  2. Andy

    Andy Notebook Prophet

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    Your temps are perfect and the fan might be ON, at a very low RPM, so I dont think there is anything to worry about. You cannot control the fan at a program level, so you can try and see if there is a BIOS update which addresses any issues relating to the FAN Algorithm....
     
    Andy, Aug 26, 2008
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  3. powerpack

    powerpack Notebook Prophet

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    Vladk1000, let me throw a few thoughts out.

    Are you saying that at 32C (102F for the Yanks) is on when plugged in? If so well I am surprised running at that temp in first place would of thought passive cooling at that point. So maybe fan issue but not "when unplugged" but always?

    What is the profile of the notebook set to? For example "Max power", "dynamic/balanced" or Max battery for example? Try Max battery see if that has an effect?

    Out on a limb, you have Nvidia GPU and bought post problem and the cure is insane fan settings to keep card running cool?

    I never really thought of fan as being a battery issue per se? I mean I have my CPU set to always downclock to use less power, run cooler and need less fan. Not fan off to save power? And to be honest I have never heard of forcing fan off to save power (heat is dangerous), forcing on sure (DeLL).

    So good luck, fan running at 102F seems strange plugged in or not. My notebook fan does not kick on tell about 140F?
     
    powerpack, Aug 26, 2008
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  4. Vladk1000

    Vladk1000 Notebook Consultant

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    I think the CPU is so cool because of the high fan speed. I'm using the Power Saver power plan, but I have the same problem with all power plans. I'm going to try undervolting the CPU, maybe that'll fix the problem.

    EDIT: Yay, I undervolted the CPU and and now the fan is powering down when I unplug the notebook. :) I'm not really sure why this fixed my problem though.
     
    Vladk1000, Aug 27, 2008
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