Question about Brother MFC-9840CDW Laser Printer

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I have a Brother MFC-9840 that comes up with Print Unable 21. I have cleaned as set out in maintenance to no avail. Please help. Thank-you

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  • gregmariaf Nov 15, 2010

    I tried entering maintenance mode but am unable to do so. Also I have tried Brothers suggestions as well.

  • gregmariaf Nov 15, 2010

    I pulled power then pressed menu (and put power cord back in) , this got me into maintenance mode. When I then tried to copy I got Machine Error 21. Is this a part replacement?

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  • Brother Master
  • 4,338 Answers

The MFC-9840 manual says that this code is reporting a mechanical error.
Try to reset your machine in maintenance mode:
menu * 2 8 6 4 (within 2 seconds)
91 and then 99 to exit service mode.

User manual:
http://www.brother-usa.com/ModelDocuments/Consumer/Users%20Manual/UM_MFC_9840CDW_EN_2378.PDF


Brother's suggestion:

Turn off the machine's power switch and then

turn it on again. If the error message continues

leave the machine for several minutes and then
try to print, copy or scan again


Good luck.....

Click on this link or copy and paste the complete link into your browser.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response.

Thanks, Joe

Posted on Nov 15, 2010

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