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  1. #1
    Technician
    Join Date
    Dec 2016
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    20.0004 in error log.

    HP LaserJet Pro MFP M521DN with Error 20.0004 in error logs.

    Error 20 is memory error. What does the 0004 mean?

  2. #2
    Service Manager 1,000+ Posts
    20.0004 in error log.


    Join Date
    Jun 2015
    Location
    Lutherville, MD
    Posts
    1,048
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    Re: 20.0004 in error log.

    From this page:

    "The printer does not have sufficient RAM to process the fax job."

  3. #3
    Technician techie0419's Avatar
    Join Date
    Apr 2017
    Posts
    36
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    15

    Re: 20.0004 in error log.

    I've seen this same error on both a M426 and M477.

    The solution I've found (trial and error with HP on the phone the first time, but it worked in both cases), is to go to Setup > Service > Fax Service > Clear Saved Faxes. The users were then able to send and receive faxes as usual.

    Prior to "Clear Saved Faxes", when trying to send even a one page fax, the machine would pass the paper through the ADF, and immediately give a message on the display that there was insufficient memory. After going through that procedure, it was a noticeable difference in that it would begin the normal fax process rather than display anything about the memory.

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