Replacing CPU fan

Discussion in 'General Electronics Chat' started by Crocboy11, Oct 9, 2013.

  1. Crocboy11

    Thread Starter New Member

    Oct 9, 2013
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    I removed the original (non working) fan from my computer which was a Datech 0925-12HBTA-2 and replaced it with an aftermarket fan purchased from Fry's.

    It fit perfect and has same 3 pin connection. Put it in, plugged it in and NOTHING!!

    Any ideas?????
     
  2. Tealc

    Member

    Jun 30, 2011
    140
    10
    Maybe both fans are working fine but the motherboard fan header is not.
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Put 12v on the Red & Blk of the original Fan and see if it runs OK.
    If it does, it points to the Header circuit, as already mentioned.
    Measure if 12vdc on the header.
    Max.
     
  4. studiot

    AAC Fanatic!

    Nov 9, 2007
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    You can test the fans with a 12 volt supply.

    Also test the drive pins on the motherboard, but using a meter. Do not run this for more than 30 seconds without the fan.
     
  5. studiot

    AAC Fanatic!

    Nov 9, 2007
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    Hey Max, glad I don't have a shootout at dawn with you.
     
  6. #12

    Expert

    Nov 30, 2010
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    Some of us type with two fingers!:D
     
  7. studiot

    AAC Fanatic!

    Nov 9, 2007
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    Fortunately this forum does not allow me to simply put up a smiley.

    :p
     
  8. MaxHeadRoom

    Expert

    Jul 18, 2013
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    It would have to be Noon, I have to have breakfast first.:p



    (Used to be 25 WPM) Courtesy of Her Britannic Majesties Royal Signals...Hrmmph :)
    Max.
     
    Last edited: Oct 10, 2013
  9. Crocboy11

    Thread Starter New Member

    Oct 9, 2013
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    If the header circuit is bad how big of a deal is that?
     
  10. MaxHeadRoom

    Expert

    Jul 18, 2013
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    If it is the 12v supply missing you would have to trace the source back, there should only be simple foil trace back to the 12v, the tach sense circuit would be into an IC of some kind, but it sounds like the 12v source is missing..
    Max.
     
  11. studiot

    AAC Fanatic!

    Nov 9, 2007
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    Have you tested the old fan yet?

    The supply at the header may be controlled by a temp sensor at the cpu. If this has failed then there will be no supply.
     
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