The printer keeps printing a black vertical line on some pages

[Oil1]

The printer will sometimes print a black vertical line on the page, usually on the left side of the page.  It's a HP Envy Photo 7855.  Thanks 

[TEJ1602]

@Oil1, Welcome to HP Support Community!

I would recommend you follow the steps from the document Black or Color Ink Not Printing, Other Print Quality Issues. This will help us isolate the issue further.

If the vertical lines still appear after troubleshooting it could be an issue with the printer's ink system. Please reach out to the HP Support in your region regarding the service options for your printer.

Hope this helps!

Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

[Kitcatth]

I can add some more information

It is clearly a printed line on an otherwise beautiful print.

I ran multiple copies of a word document - short 1 page form and it printed on the left of copies 2 through 12,  I had noticed this before.  This printer was purchased and installed in the last two weeks so if I'm going to return it will go back to the store for a different brand - so please tell me there is an answer.  I had a previous version of this printer that I ran for 4 years with no problems.

Then I tried doing research and got to the recommendation below to trouble shoot.  I did some of the steps and decided to print the list so I could keep track of what I was doing.  It printed the line on right side of page 3, the left side of page 4, the right side of page 9 and not any place else on the 11 pages of duplex print.

So before I run through more of the steps for what seems to be a print quality solution I would like more guidance.