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 4. | Go to step 3. |
Step 3 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Replace the toner cartridge. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Print the document.
Is the print mottled? | Go to step 4. | The problem is solved. |
Step 4 Check the status of the imaging unit. - From the home screen, touch Status/Supplies > Supplies.
Is the imaging unit near end of life? | Go to step 5. | Contact customer support. |
Step 5 ![](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. |