Vertical lines or streaks when printing from my laser jet pro MFP M177fw

[Ray_tan]

how could I solve the vertical lines or streaks when printing. Does it due to the problem of the print cartridge ? Solve it by just buy another print cartridge to replace it? Thanks

[Raj_05]

Hi @Ray_tan,

Welcome to HP Support Community.

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

Vertical lines or streaks in printouts from your HP LaserJet Pro MFP M177fw can be caused by several issues, and a print cartridge problem is one possible cause. Here’s a step-by-step guide to help you diagnose and fix the issue.

Check the Print Cartridge:

• Remove and Inspect: Open the printer and carefully remove the print cartridge. Look for any visible damage or leaks.
• Clean the Cartridge: Gently clean the cartridge’s metal contacts with a lint-free cloth or cotton swab lightly moistened with distilled water. Allow it to dry completely before reinserting it.
• Check for Toner Clumps: Shake the cartridge gently side to side to evenly distribute the toner inside.

Inspect the Drum Unit:

• The drum unit, which transfers toner onto the paper, can also cause streaks if it’s damaged or dirty. If your printer has a separate drum unit, inspect it for any signs of damage or residue.

Perform Printer Maintenance:

• Clean the Printer: Most laser printers have a cleaning mode in the settings. Run the cleaning process to clear any toner residue inside the printer.
• Check for Obstructions: Ensure that there’s no debris or toner buildup inside the printer.

Test with a Different Cartridge:

• If the problem persists after cleaning, try replacing the print cartridge with a new one. If the vertical lines or streaks disappear, it’s likely that the original cartridge was the issue.

Check Printer Settings:

• Ensure that your printer settings are correctly configured for the type of media you are using.

I hope this helps.

Take care and have a good day.

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Alden4

HP Support