Color LaserJet Pro M255dw is making knocking noises when printing

[zugzwang28]

Color LaserJet Pro M255dw is making knocking noises when printing. How can I fix that?

[A_Gayathri]

Hi @zugzwang28 ,

Welcome to The HP Support Community.  

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

I understand your Color LaserJet Pro M255dw is making knocking noises while printing, it could be due to several potential issues. Here are some steps you can take to troubleshoot and hopefully resolve the problem:

Check for Paper Jams:

• Open all accessible areas of the printer, including the paper tray, output tray, and toner access areas. Look for any paper jams or obstructions that might be causing the noise.

Inspect the Toner Cartridges:

• Remove the toner cartridges and check for any visible damage or loose components. Reinstall the cartridges carefully, ensuring they are seated properly.

Examine the Fuser Unit:

• The fuser unit can sometimes cause noise if it’s malfunctioning. Ensure the fuser is properly installed and that there are no foreign objects inside.

Check the Paper Path:

• Ensure that the paper path is clear and that there are no obstructions or torn pieces of paper that might be causing the knocking noise.

Look for Loose Parts:

• Carefully inspect the internal components of the printer for any loose parts or components that might be rattling or causing the noise.

Update Firmware: Update the firmware on an HP printer

• Check if there is a firmware update available for your printer. Sometimes, firmware updates can resolve hardware issues or improve printer performance.

Run a Printer Diagnostic:

• Use the printer's built-in diagnostics or HP Smart app to run a diagnostic test. This might help identify any issues or provide error codes that can guide further troubleshooting.

Refer to this document: HP Color LaserJet Pro M255dw User manual

I hope this helps. 

Take care and have a good day.

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