Support article for Lexmark C792

'31.05 Defective Cartridge' Error on the Lexmark C792 or X792 Series Printers

Overview

A malfunctioning toner cartridge usually causes a "31.05 <color> Defective Cartridge" error. Some cases exist in which the issue is temporary, however, and can be resolved without replacing the cartridge. Refer to the information below for directions on clearing this message.

Recommended actions

NOTE: The images in the following table show the Lexmark C792 models. However, these directions also apply to the Lexmark X792 models.

Steps	Action	Image
1	If this is the first time the message appears, power off the printer/MFP. Leave it powered off for 30 seconds or more and power it back on. Did this clear the error? Yes: Issue resolved.No: Proceed with Step 2. Note: If you have already tried powering the printer off and on, skip ahead to Step 2.	No Image
2	Power off the printer/MFP again and open the front door.	Click here to enlarge
3	Grasp and lift the top green handle, then slide the cartridge out of the machine.	Click here to enlarge
4	Verify whether the part number of the toner cartridge(s) you have installed are compatible with your particular printer model. Note: If the affected toner cartridge's part number is not compatible with the printer, replace it with a new Lexmark cartridge for this printer model.	No Image
5	Inspect the print cartridge for damage or excessive toner contamination. Note: If damage exists, replace the affected consumable supplies with a brand-new toner cartridge.	No Image
6	Insert the cartridge back into the printer. Then push the green handle back in place to ensure that the cartridge is seated correctly.	Click here to enlarge
7	Close the front door completely. Power on the printer/MFP again. If the error remains, please contact Lexmark Technical Support or a local authorized service provider for additional assistance.	Click here to enlarge

Still Need Help?

Please contact Lexmark Technical Support if you need additional assistance.
NOTE: When calling for support, you will be asked for your machine/model type and serial number (SN). If you need help locating these,

How to Locate the Serial Number, Machine Type, and Configuration ID on a Lexmark C792 or X792 Printer/MFP

Please call from near the printer in case the technician on the phone asks you to perform a task involving the printer.

LEGACY ID: SO6447

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