[cadillac60]

When I try to print a page with black ink only, it prints a blank page.
I have installed new printheads, and new HP cartridges but the problem continues. Color is okay, and the black ink level shows full.
I followed HP's instructions including full reset RVM, but still cannot print black. Can anyone help me solve this?

Thank you

John Martin

 

[masterjed]

Please follow this document and let me know as soon as possible for the results.thanks.
Troubleshooting Print Quality Issues HP Officejet Pro L7780 All-in-One Printer - HP Customer Care (United States - English)

 

[cadillac60]

Yes I have already completed all of those steps, but I still get a blank page when I try to print in black.