Dirty prints

[V8JFN]

My printer passes all diagnostics but the prints are coming out with faint triangular markings on the left hand side.

[Alden4]

Hi @V8JFN,

Welcome to HP Support Community.

Thank you for posting your query, I will be glad to help you.

Faint triangular markings on prints from your HP Color LaserJet Pro M255dw printer could indicate several potential issues. Here are some troubleshooting steps you can try.

• Check Toner Cartridges: Ensure that the toner cartridges are properly installed and not low on toner. Low toner levels can cause faded or incomplete prints. If any cartridges are low, replace them with genuine HP cartridges.
• Clean the Printer: Dust or debris inside the printer, especially around the toner cartridges and imaging drum, can cause print quality issues. Use a clean, dry cloth to gently wipe away any dust or debris.
• Check Paper Quality: Low-quality or incompatible paper may cause printing issues. Make sure you're using high-quality, compatible paper for your printer. Also, check if the paper is damp or wrinkled, as this can affect print quality.
• Inspect Imaging Drum: The imaging drum may be dirty or damaged, causing the triangular markings. Remove the imaging drum and inspect it for any visible damage or debris. If it's dirty, carefully clean it with a soft, lint-free cloth.
• Adjust Print Settings: Sometimes, adjusting the print settings can improve print quality. Try changing the print resolution or adjusting the toner density settings in the printer driver.
• Update Firmware and Drivers: Ensure that your printer's firmware and drivers are up to date. HP often releases updates to address printing issues and improve performance.
• Perform Maintenance: Run any maintenance routines or cleaning cycles available in your printer's settings menu. This can help remove any residual toner or debris that may be causing the issue.

By following these steps, you should be able to identify and resolve the issue with the faint triangular markings on your prints.

I hope this helps.

Take care and have a good day.

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Alden4

HP Support