my 6978 will only print black and white - it was printing color fine - have plenty of colored...

[Raj1788]

@carolynj77,

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 out 🙂

I understand that you are facing a print quality issue.

Don't worry I'll be glad to help, however, to provide an accurate resolution, I need a few more details: 

Are you using genuine HP cartridge?

Have you removed all the packing material of the cartridge?

Is copy working in color?

Click here and check the print driver settings.

If the issue persists, follow the below steps.

Align the printhead using the printer control panel.

1. On the printer control panel, swipe down to open the Dashboard, and then touch the Setup icon .

2. Swipe up on the display, and then touch Printer Maintenance.

3. Touch Clean Printhead, and then touch Continue.

   A test page prints.

   Figure : Example of the printhead cleaning test page

   

4. Examine the test page.

   • If the print quality is unacceptable, touch Clean Again to continue the next level of cleaning. Repeat these steps for the third cleaning stage, if necessary.

        NOTE:

     If the printhead is badly clogged, it might require another cleaning cycle. If so, wait 30 minutes before you perform all three levels of cleaning again.

   • If the print quality is acceptable, touch Done.

Try to print.

Do get back to me as I have a few more tricks up my sleeve. Said that, if I have helped you resolve the issue.

If you like to appreciate my efforts clicking on 'Accepted as Solution'

Feel free to give me a virtual high-five by clicking the 'Thumbs Up'

Have a great day Ahead!

[carolynj77]

I resolved my issue by changing all of the color cartridges, even though they were not low. The only ones I had were generic, so I doubted very much that it was going to work since I was replacing hp cartridges, but it worked. So strange! But thank you for taking the time to answer me.

[MKazi]

@carolynj77

You're most welcome. 🙂

I'm glad that the issue is fixed and the printing is fine. Fabulous analysis. Spectacular diagnosis of the issue before posting. Kudos to you for that. 

As @Raj1788 is out of the office today I replied to you.

Feel free to keep us posted for any further questions.

Happy printing! 🙂