Please try the steps provided below.
Step
Action
1
Power off the printer/MFP and open the toner access door. Reseat all of the toner cartridges. Power on the printer/MFP again and print a test page.
Did the error message return?
Yes: Continue to Step 2.
No: The error is resolved.
2
Power
off the printer/MFP and remove the developer unit for the color
specified in the error message, and then reseat it. Power on the
printer/MFP again and print a test page.
Did the error message return?
Yes: Continue to Step 3.
No: The error is resolved.
3
It
is possible that specified color's toner cartridge and developer
unit are defective. If you have a replacement toner cartridge and
developer, install them as a test and print a trial page.
Did the error message return?Yes: Continue to Contacting Lexmark.
No: The error is resolved. If the toner and/or developer were not near the end of their working life.
You can also refer to this link: http://bit.ly/kecjEM
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