HP OfficeJet Pro 7740 Print Head Issues

[NumbGnat]

My HP OfficeJet 7740 started exhibiting printing issues, where there were lines across the page. I tried all of the troubleshooting steps, recommended in this Google Gemini Chat.

After the final step, of Soaking the print-head in hot, distilled water, I ran a series of six (6) "Clean Printhead" operations on the printer.

I am attaching them below. Please know that, before I soaked the printhead, the gap between the top and bottom of the A, B, & C, on the top, was *much* larger than the first cleaning/test here.

As you can see, cleaning operation 1 still left a lot of lines missing, but as the cleanings continued, that gap between the top and bottom started to shrink.

It felt like, the more I cleaned the printhead, the smaller that gap got. Like there was still ink clogging the lower half of the printhead. I thought maybe it would eventually clear out, if I kept cleaning. But I didn't want to waste $250 worth of ink, trying to clear out a $120 printhead.

Is this a problem with the printhead, or the printer?

 

 

 

 

 

 

[Rita_R2]

Hi, @NumbGnat, Welcome to the HP Support.

I will be more than happy to help you. while I am an HP employee, the views expressed here are my own and may not necessarily reflect the views of HP. By sharing relevant video links, I aim to provide clear, practical guidance in an easy-to-follow format. These tailored video resources are designed to address queries more effectively and enhance understanding. I hope you find them helpful as well.

Here are the links which will help you to resolve the issue: 

Printing a Quality Diagnostics Page | HP Officejet Pro L7500, L7600 & L7700 | HP

Fix print quality problems | HP inkjet printers | HP Support

How to fix vertical bands, lines, or streaks in copies or scans on your HP printer| HP Support

Do keep me posted. 

  

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. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping! 

RITA_R2

HP Support