When I scan, my printer is printing vertical lines

[Chablis124]

Printer is printing vertical lines when I scanned something

[A_Gayathri]

Hi @Chablis124 ,

Welcome to The HP Support Community.  

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

I understand you are getting vertical lines appearing on scanned documents from your HP ENVY Photo 7855 All-In-One Printer could be caused by various factors. 

Here are some troubleshooting steps you can try to resolve the issue:

• Clean the scanner glass: Dust, fingerprints, or other debris on the scanner glass can cause lines to appear on scanned images. Use a clean, lint-free cloth and glass cleaner to thoroughly clean the scanner glass.
• Check the scanner bed: Ensure that there are no obstructions on the scanner bed that could be causing interference with the scanning process. Even small particles or pieces of paper can affect the scan quality.
• Adjust scanning settings: Sometimes, incorrect scanning settings can result in poor-quality scans. Make sure that you've selected the appropriate settings for your scan, such as resolution and color depth. You can typically adjust these settings through the printer's control panel or the scanning software on your computer.
• Update printer drivers: Outdated or corrupted printer drivers can cause various issues, including scanning problems. Check if there are any updates available for your printer drivers and install them if necessary. You can usually find driver updates on the HP website or through the printer's built-in software. Software and Drivers for HP ENVY Photo 7855 All-in-One Printer
• Restart the printer: Sometimes, simply restarting the printer can resolve temporary issues. Turn off the printer, wait for a few seconds, and then turn it back on again.
• Check for firmware updates: In addition to updating printer drivers, it's also a good idea to check for firmware updates for your printer. Firmware updates can address bugs and improve overall performance. Update the firmware on an HP printer

Refer to this document: HP ENVY Photo 7100, 7800 printers - Color or black ink not printing, other print quality issues

HP ENVY Photo 7855 All-in-One Printer

I hope this helps. 

Take care and have a good day.

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