Step 1 Check if the printer is using a genuine and supported Lexmark toner cartridge. Note: If the toner cartridge is not supported, then install a supported one. Print the document.
Do vertical dark lines or streaks appear on prints? | Go to step 2. | The problem is solved. |
Step 2 Remove the printhead wiper, and then clean the printhead lens. Print the document.
Do vertical dark lines or streaks appear on prints? | Go to step 3. | The problem is solved. |
Step 3 Remove, and then insert the imaging unit. Warning—Potential Damage: Do not expose the imaging unit to direct light. Extended exposure to light can cause print quality problems. Warning—Potential Damage: Do not touch the photoconductor drum. Doing so may affect the quality of future print jobs. Print the document.
Do vertical dark lines or streaks appear on prints? | Go to step 4. | The problem is solved. |
Step 4 Replace the imaging unit. Print the document.
Do vertical dark lines or streaks appear on prints? | Contact customer support. | The problem is solved. |