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HP Office Jet Pro 6978 Wont Print Black Ink

HP Office Jet Pro 6978
Microsoft Windows 10 (64-bit)

I have seen other posts about this from a few years back but my printer will  currently not print black ink. We just replaced all the cartridges and started having this issue, bought HP cartridges from Target, so I know there is ink in there. I have read several of the suggestions posted in other responses, including tried to clean the printer heads but still nothing. It wont print black from a print or copy functionality, nothing shows up. Tried multiple types of documents from different devices. Tried the troubleshooting here, with no progress:


I also saw several people say it was a faulty ink cartridge but it was a 902XL and I don't want to keep wasting money and buying that to try because, as you know, they are not cheap. 


Please advise, thanks!



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HP Support Agent
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HP Recommended

HP Office Jet Pro 6978 Wont Print Black Ink



Welcome to the HP Support Community!


I reviewed your post and I understand that the printer is not printing black and you are also unable to make a copy in black.


Don’t worry, I assure you I will try my best to get this sorted.


Did you follow the steps in the article listed below?


I recommend you contact support and they will replace the cartridges for you in case if the issue is with the cartridges.


Here is how you can get in touch with support.


1)Click on this link –

2)Select the product type.

3)Enter the serial number of your device or select let HP detect your product option.

4)Select the country from the drop-down.

5)You should see the HP phone support number or Chat option listed.


Let me know how it goes and you have a great day!


If you wish to show appreciation for my efforts, mark my post as Accept as Solution. Your feedback counts!



I am an HP Employee

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