black line when copying a document

[Rock1969]

I'm getting a black line down the center of the page when copying a document.

[A_Gayathri]

Hi @Rock1969,

Welcome to The HP Support Community.  

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

I understand there may be an issue with the scanner or the document feeder of your HP OfficeJet Pro 8720. Here are a few steps you can take to troubleshoot and potentially resolve the issue:

• Clean the scanner glass: Sometimes, dirt or debris on the scanner glass can cause lines or streaks on copied documents. Make sure to clean the glass thoroughly with a soft, lint-free cloth.
• Inspect the document feeder: If you're using the document feeder to copy multiple pages, check for any obstructions or debris that may be causing the issue. Clean the rollers and the feeder mechanism.
• Check the original document: If the original document you're copying has any marks or smudges, they may be picked up by the scanner and appear as lines on the copied document. Try copying a different document to see if the issue persists.
• Update printer drivers: Ensure that your printer drivers are up-to-date. Sometimes, outdated drivers can cause printing or copying issues.  Software and Drivers for HP OfficeJet Pro 8720 All-in-One Printer series
• Perform a printer reset: Turn off the printer, unplug it from the power source, and wait for a few minutes. Then, plug it back in and turn it on again. This can sometimes resolve minor issues with the printer's hardware.

Refer to this document: HP OfficeJet Pro 8720 All-in-One Printer series

I hope this helps. 

Take care and have a good day.

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution.