Lines on making copies

What causes black lines on paper when printing?
Usually streaks or vertical lines are caused by empty toner cartridge or toner itself is damaged. It's also due to a dirty pick up roller or paper path. You can contact HP Tech Support so they can replace your printer

Vertical Bands, Lines, or Streaks in Copies, Faxes, or Scans

support.hp.com/us-en/document/c02881567

Figure : Sample output with vertical colored bands or lines ... Remove any paper from the automatic document feeder (ADF) tray. ... To protect the scanner, do not spray the glass cleaner directly on the glass. .... determine if your printer is still under warranty, and then Contact HP Support to schedule a repair or replacement.

How to get rid of lines on a copied page - YouTube

? 2:10
https://www.youtube.com/watch?v=xTJpCg5sHl0
Feb 17, 2010 - Uploaded by Wayne Springer
When you make copies on your copy machine, does it ever leave a black vertical line ... QLS ' How to Eliminate Vertical Linesfrom Scans, Copies & Faxes ... Part 2- Fix or repair color laser printer with fading, light print, or lines ...

clean the glass may be he have some liquid eraser or some scratch ang clean all yhe mirrors onside the optic unit

Most likely a fax has been sent or a page copied with 'white out' (Liquid Paper), still wet on the page. As the page feeds over the scanner, (a narrow strip of glass that runs across the width of the page along the feed path) the wet liquid paper comes off on the glass as a thin line and dries. Thereafter, when copying, scanning or sending a fax, the scanner light does not go through the liquid paper streak and the result when printed is a thin vertical line that runs the full length of the page.

If this is your problem: follow the path that the paper travels when sending a fax or making a copy, until you find the scanner (narrow glass strip). Take a clean, soft cloth and a small amount of methylated spirit (or white spirit) and remove the now dried Liquid Paper from the glass. Clean the whole strip ensuring that the glass is left clean and dry.

There is something on your scanner glass. Clean the glass with glass cleaner. If this happens when using the automatic document feeder, open the top side cover where the paper feeds into. There is a narrow glass strip there. Clean that as well.

If this fails, the scanner head has a bad sector on the CCD and will need to be replaced. You will probably find that it will be cheaper to replace the printer entirely if that is the case.

This can be caused by a damaged fuser or drum try to change the cartridge and if that does not resolved the issue then its the fuser

Change the toner cartridge

All you need to do is to clean the small wide glass (that at the LEFT of the main flat big class). The Auto Document Feeder (ADF) specifically uses this glass to scan for copy (and fax). When it is dirty (such as small dirt or particles on the surface which is easy to gain in long run), it will create thin vertical line(s) as the result.

there is a dirt on the ADF (CIS contact image sensor) that reads your document, identify where the lines came from either from top or bottom then open your adf and clean the affected area. this will solve the problem.

There is a thin strip of glass that you will see when you lift the top feeder. There is most likely white-out on it.

When you use the top feeder, it doesn't use the large glass, it only 'rolls' the original document over this small strip of glass.