Note: Before solving the problem, print the Print Quality Test Pages. From the control panel, navigate to Settings > Troubleshooting > Print Quality Test Pages. For non‑touch‑screen printer models, press to navigate through the settings.
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.
Print the document.
Do vertical white lines appear on prints?
Go to step 2.
The problem is solved.
Fix slow printing problems. For more information, see Slow printing.
Go to step 3.
Replace the imaging unit.
Contact customer support.
Clear vertical dark lines when you make a copy, send a fax, or scan an image. Here are the recommended fixes.
Prevent vertical lines from appearing across your prints by checking the toner cartridge.