Step 1 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Check if the printer is using a genuine and supported Lexmark toner cartridge. Note: If the cartridge is not supported, then install a supported one. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Print the document.
Is the print mottled? | Go to step 2. | The problem is solved. |
Step 2 Check the printer for leaked toner contamination. Is the printer free of leaked toner? | Go to step 3. | Contact customer support. |
Step 3 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Check the status of the imaging unit. From the control panel, navigate to: Settings > Reports > Device > Device Statistics ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) From the Supply Information section of the pages printed, check the status of the imaging unit.
Is the imaging unit near end of life? | Go to step 4. | Contact customer support. |
Step 4 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Replace the imaging unit. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Print the document.
Is the print mottled? | Contact customer support. | The problem is solved. |