HP EliteBook 840 G6 fan spinning at 100% after bios unlock

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  • aluminiumdisulfid
    Member
    • Dec 2019
    • 26
    • DE
    #1

    HP EliteBook 840 G6 fan spinning at 100% after bios unlock

    Hi guys,

    I have a HP EliteBook 840 G6 here which I unlocked with RCUnlocker.
    It boots fine, does everything it should, except that the fan spins permanently at 100%.
    Already tried other fans. Then I made a BIOS update with no success either.

    I tried restoring my backup dump but got nowhere with it. I don't know if it was due to bad soldering or because the bios update might have caused something to be incompatible now. At least that was my conclusion after multiple attempts.

    Funny thing - I got a used replacement mainboard from ebay and...same problem.
    It looks a bit like somebody soldered there as well...but did a very neat job. Almost unnoticeable.
    I switched fans again, removed all peripheral boards, but fans spin at 100% on both boards now.

    Am I missing something?
    Can somebody make sense of it all? Could it be some ME or other BIOS problem? (Which accidentally the other guy ran into as well with his board?)

    Regards
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