Showing results for 
Search instead for 
Did you mean: 
New member
5 2 0 0
Message 1 of 2
Flag Post
HP Recommended

When do you know you need a printhead?

When do you know you need a printhead?

I changed  black ink but it's not printing 

HP Support Agent
HP Support Agent
7,692 7,685 423 585
Message 2 of 2
Flag Post
HP Recommended

When do you know you need a printhead?

Hi @Nashed,

Welcome to HP Forums, this is a great place to get support, find answers and tips.

Thank you for posting your query. I'll be more than glad to help you.

I understand that you are facing issues with your HP Officejet Pro L7780 All-in-One Printer wherein it is not printing in black after changing the black ink cartridge.


This issue could occur if the printhead is expired or the nozzles may be clogged.


Let's go through a few steps that may help to fix this issue.


And here are a few steps in the link: Fixing Print Quality Problems


The print quality diagnostic report will tell about the printhead health. Accordingly, you need to replace it.


For printhead replacement, you may need to contact HP phone support from this link:
You may select the country and type the product# of the unit and then follow the on-screen instructions to contact HP phone support.


You have a good day ahead.

I am an HP Employee

If you found this post helpful, you can let others know and also show your appreciation by clicking the Accept as Solution button, Thumbs up" button!

0 Kudos
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation