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909 Zero Cross Fail Error

Document ID:SO4449

Usergroup :External
10/20/17 Properties  


Affected products

Click Properties on the above title bar to see the full product list applicable to this article.




 A 909 Error indicates that the MFP/printer has detected a problem with the electrical power being supplied to it and has shut down to prevent damage.

Possible cause

Power surges or dirty power near 0 volts (the point at which the MFP/printer turns the fuser on) is the most likely cause of this issue.




Step Action Yes No
Check to see if you had any electrical problems recently. For example:


  • Electrical work or repairs
  • Electrical damage such as a lightning strike or building damage
  • Problems with other electrical equipment, such as computers


Have you had any electrical problems recently?


You need to contact your power company and have the company check the power source. See Step 2.


Power the printer off, wait 30 seconds, and power it back on.


Did this resolve the issue? 


 Print a test page. If there's no error and the page prints, the issue is resolved.  See Step 3.

Connect the MFP/printer to a different power outlet.  (This can be done temporarily with a heavy duty extension cord.) Try to find an outlet that:

  • Is connected to a different power circuit.
  • Has previously had an X85x or W840 installed that functioned properly.
  • Is in a permanent wall (avoid outlets in temporary cubicle furniture).


Did the error remain?


 Contact Lexmark Technical Support.  You need to contact your power company and have the company check the power source.



Contacting Lexmark

If you need additional assistance, please go to the Lexmark support site, type your printer model and locate Get in Touch with Lexmark! for contact information. NOTE: When calling for support, you will need the following:

  • Printer model
  • Printer serial number
  • Toner/imaging unit/waste toner bottle part number and serial number (for supply-related issues)

Please be near the product/s described in this article to expedite the support process and reduce callbacks.




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