Question about Lexmark X500n Color Laser All-in-One Printer

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Warning: CPU Fan is LOCKED -- Lexmark X500n printer

This is an error message we get on a consistent basis now on our laser-jet printer. #1 - is this as simple as changing out a CPU fan. #2 - how do I do this?

Exact same problem.  No fan appears to be available.  Lexmark says it requires a total motherboard replacement.  Printer is 14 months old, 2 months out of warranty.

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  • nhaskell Jan 06, 2009

    Error message = Warning: CPU Fan Locked.

    When I open up the printer, the CPU fan is starting and stopping.  A simple replacement will likely solve the problem, but Lexmark doesn't have a part number for just the fan.  They claim an entire motherboard replacement is necessary.

  • nhaskell Jan 06, 2009

    Lexmark x502n, Model# 7100-110.  Thank you!

  • ryancrop Jan 15, 2009

    We are having the exact same problem. Bought the unit in Nov of 07 and have had the error message for about 2 weeks. We have had our local IT guy look at it and he said it will probably last for quite a while. To replace the motherboard would be about as much as purchasing a new printer. Glad we are outside the warranty by 2 months!

  • ftcnet-ca Mar 25, 2009

    Low Profile Copper CPU Fan For P4 (Socket 478) w/Blower (JACA-44C) $71.00
    .. is NOT the right fan, not even close (wrong voltage)
    the Lexmark X500n, X502n needs a 24V DC 5x5x1cm 3-wire fan

    The most commonly available fans of the correct size are 12VDC.

  • tprimont Apr 07, 2009

    when i turn the machine on cpu fan is locked appears.tried a 24 volt fan to no still said the same thing and no fan movement.

  • Anonymous May 13, 2009

    Has anybody been able to find a replacement CPU fan for the Lexmark X500n?

  • Dan rogers
    Dan rogers May 11, 2010

    i need the whole model number and ill will be happy to see what i can find for you

  • Dan rogers
    Dan rogers May 11, 2010

    what is the error message and what fan are you talking about?


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I fixed this in 12 minutes. I took the fan out, lubed it up with a high-tech petroleum based lube and freed up the fan. Reinstalled and no more error message. We ordered a new one so when this fails, we'll be ready. It seems that moisture got into the axle and corroded it and caused it to lock up.

Posted on Aug 11, 2009

  • Pie-man Aug 11, 2009

    We ordered a replacement from these nice people:

  • Danny Jul 08, 2012

    I follow your instructions and the fan freed up and clear the error message.



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We have this replacement fan in stock follow this link to purchase

Posted on Jun 23, 2009

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Wow!  After several hours searching I found the fan connectors to buy (since the fan comes with bare wires from  The connector is made by JST America and can be purchased from Digikey at
Part number 455-1126-ND for the housing 
Part number 455-2148-1-ND for the pins

(You have to buy at least 10 housings and 100 pins but together they cost about $2.50 total)

You can buy the crimper too, but they are $1,300.  I just use a needle nose pliers.

Good luck

Posted on Mar 20, 2010

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I had an old celeron processor 12VDC fan, cutted some plastic, tied some wires with a 6VDC adaptor, made a whole for the screw, and I have circulating air again.

Posted on Jul 23, 2011

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The Cypower-Fan has no connector. If you need the Fan WITH CONNECTOR order it here:

Posted on Mar 08, 2010

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I found this site It is hard to find but you are looking for this. It is near the bottom.

Low Profile Copper CPU Fan For P4 (Socket 478) w/Blower (JACA-44C) $71.00

Posted on Jan 06, 2009

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