color prints but black does not on HP Officejet Pro 6978 printer

[Pipeliner1]

Daughter gave this to me said it would not print at all . Printer would print but no ink on paper. Flushed out print head and got the color ink flowing good but no black ink at all

[Kumar0307]

@Pipeliner1, Welcome to the HP Support Community! I’m here to help.

I understand the printer is not printing in black. Make sure you are using HP inks.

Kindly perform the steps mentioned in this document - Black or Color Ink Not Printing, Other Print Quality Issues

Check the ink levels, clean the printhead up to 2 times, and print a test page to check the result.

If this does not help, you may have to replace the black ink cartridge. If you have already done so and the issue persists, I'm afraid the printhead has gone bad which is non-removable in this model printer.

• I've sent you a private message with further instructions to resolve this issue.
• In order to access your private messages, click the private message icon on the upper right corner of your HP community profile, next to your profile Name or simply click on this link: https://h30434.www3.hp.com/t5/notes/privatenotespage

Hope this helps! Let me know how it goes. 

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Have a great day!