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.
Do horizontal light bands appear on prints? | Go to step 2. | The problem is solved. |
Step 2 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Remove the printhead wiper, and then clean the printhead lens. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Print the document.
Do horizontal light bands appear on prints? | Go to step 3. | The problem is solved. |
Step 3 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Remove, and then insert the imaging unit. Warning—Potential Damage: Do not expose the imaging unit to direct light. Extended exposure to light may cause print quality problems. Warning—Potential Damage: Do not touch the photoconductor drum. Doing so may affect the quality of future print jobs. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Print the document.
Do horizontal light bands appear on prints? | Go to step 4. | The problem is solved. |
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.
Do horizontal light bands appear on prints? | Contact customer support. | The problem is solved. |