Step 1 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Depending on your operating system, specify the tray or feeder from the Printing Preferences or Print dialog. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Resend the print job.
Do horizontal dark lines still appear on prints? | Go to step 2. | The problem is solved. |
Step 2 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Depending on your operating system, specify the paper type and weight from the Printing Preferences or from Print dialog. Notes: - Make sure that the settings match the paper loaded in the tray.
- You can also change the settings on the printer control panel.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Resend the print job.
Do horizontal dark lines still appear on prints? | Go to step 3. | The problem is solved. |
Step 3 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Load paper from a fresh package. Note: Paper absorbs moisture due to high humidity. Store paper in its original wrapper until you use it. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Resend the print job.
Do horizontal dark lines still appear on prints? | Go to step 4. | The problem is solved. |
Step 4 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Remove, and then reinstall the imaging unit or imaging kit. Warning—Potential Damage: Do not expose the imaging unit or imaging kit to direct light for more than 10 minutes. Extended exposure to light may cause print quality problems. Warning—Potential Damage: To avoid damage, do not touch the underside of the imaging unit or imaging kit. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Resend the print job.
Do horizontal dark lines still appear on prints? | Go to step 5. | The problem is solved. |
Step 5 Replace the imaging unit or imaging kit, and then resend the print job. Do horizontal dark lines still appear on prints? | Contact customer support. | The problem is solved. |