OfficeJet Pro L7780: Officejet Pro L7780 missing of the vertical lines on text & photos

Everything that I try to print has lack of vertical lines, text or photos. Happens if I print from my computer or if I try to copy a page directly to the printer. I went through the troubleshooting page full... the ink is all well heads, all good impression. Whenever I try to run a printer align it does not end the page. Whenever I have nothing he's trying to align printer print when its done & still cannot print the entire page. Gives me an error and says to check my documataion. I checked the book with my printer & there is nothing in this whole problem.

Help, please!


Hi @LockGal,

Welcome to the Forums of HP Support!

I see that you are having problems with your HP Officejet Pro L7780 printer aligning and printing vertical lines. I'd be happy to help you and don't forget to come back to this thread and check "Accept as Solution", if I have successfully helped solve you the problem. If you want to say 'Thank you' to my effort to help, click on the "thumbs up" to give me a Kudos.

I understand the frustration that this must be for you. Looks like there are two separate issues. When the printer clean print heads and not properly align itself, this indicates that there is a problem with the cartridge, the print head or the line break. For vertical lines, it is usually independent for cartridges and print heads (not being is not a print quality problem). The paper type and print settings might be the problem.

To help determine the cause have you used this document: troubleshoot print quality HP Officejet Pro L7500, L7600, and L7700 all-in-One Printer Series?

Use the document in the order will help you determine if the print heads need to be replaced. If so, please contact HP.

Please confirm that the vertical or horizontal lines?

NOTE: are not replace the cartridges and printheads for vertical streaks in a print. Instead, check the paper as directed earlier in this document, or search for a document that addresses this issue. Vertical streaks on copies can often be fixed by cleaning the scanner glass.

If you have completed all the above steps and your product still has a problem, service the product.

Contact HP for service in all countries except Asia-Pacific.
First, check your product warranty to check your warranty printer status and then go to contact HP support to find an authorized dealer or to schedule a repair.
Cost of repair out-of-warranty printers may apply.
What you can do, is to use the following link to create yourself a file number, then call and it can help to expedite the appeal process:
Step 1. Open the link:
Step 2. Enter the product number or select Auto detection
Step 3. Scroll up to "still need help? Fill out the form to select your contact options.
Step 4. Scroll down and click on options contact HP - click Get phone number
File number and phone number are displayed.

Please reply to this message with the result of your troubleshooting. I can't wait to hear strings attached good luck!

Tags: HP Printers

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