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Lexmark MS431

Lexmark MS431

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Vertical dark streaks with print missing

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.

ActionYesNo

Step 1

  1. Remove, and then insert the imaging unit.

    Warning—Potential Damage:  Do not expose the imaging unit to direct light for more than 10 minutes. Extended exposure to light may cause print quality problems.

    Warning—Potential Damage:  Do not touch the photoconductor drum under the imaging unit. Doing so may affect the quality of future print jobs.

  2. Print the document.

Do vertical dark streaks with missing images appear on prints?

Go to step 2.

The problem is solved.

Step 2

  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.

  2. Print the document.

Do vertical dark streaks with missing images appear on prints?

Contact customer support.

The problem is solved.
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