Officejet pro 6975 goes through printing process but nothing prints

[2023Karl]

We have an OfficeJet Pro 6975.  It doesn't get used often but always worked fine when called upon.  When prompted to print, the machine feeds the paper, print head goes thru the motions, makes all the noises, but noting is printed on the page.   It's not light, or faded, or splotchy issue.   Nothing is printed.    I've gone through everything the virtual assistant suggested; clean print head, align print head, clean smear.  The black cartridge is new, the menu says it's full, the vent hole in clear.  I've tried different paper as suggested.  I've tried printing colored documents, still nothing on the page.  We get the same results printing from the tower or laptop.  

Any suggestions?

[Nal_NR]

Hi @2023Karl,

Welcome to the HP Support Community. 

I'd like to help!

I understand that you are facing issues with your HP OfficeJet Pro 6975 All-in-One Printer wherein it does not print in black.

This issue could occur if the cartridges are not vented properly or the printhead may be defective or damaged.

Let's go through a few steps that may help to fix this issue.

And here are a few steps in the link: Black Ink is Not Printing

If the issue still persists, please contact HP phone support from this link: www.hp.com/contacthp
You may select the country and type the product# of the unit and then follow the on-screen instructions to contact HP phone support.

Hope this helps! Keep me posted for further assistance.
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