HP OfficeJet pro 6975 does not print black

[Janinew287]

Hello community, 

I own a HP OfficeJet pro 6975 printer. It always worked perfectly but just recently stopped printing black. It prints all of the other colors. It also shows me in the menu that my ink cartridge is completely full.

I have now purchased my second cartridge and it’s still not printing black. I tried all of the options that the printer offers of cleaning the print head etc. What else can I do? The printer itself does not notice that it’s not printing black. 
Thank you so much! 

[Nal_NR]

Hi @Janinew287

Welcome to the HP Support Community. 

I'd like to help!

Follow the steps from this document here and see how it goes. 

Update the firmware

Hope this helps! Keep me posted for further assistance.
Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

[Nal_NR]

Hi @Janinew287,

Hope I was able to fix the issue. If you need further assistance, feel free to reach out to us. 

Give us some reinforcement by clicking the Accepted Solution button, that'll help us and others see that we've got the answers and did reply to you