Hi
Thanks for visiting the HP community. 
A very good day to you! I read the post regarding assistance with black ink not printing after replacing cartridges. I will be delighted to assist you here.
You’ve done an excellent job on diagnosing the issue from your end. Superb effort and spectacular research were done as well. Kudos to you on that score. . I take it as a privilege to share this platform with you.
For better clarity and to assist you better I would require more information regarding this:
- Did you try to contact HP phone support in this regard?
It looks like a hardware issue with the printer. As you’ve tried all the troubleshooting steps:
For now please perform these steps:
Please contact HP phone support to get the printer replaced if you’ve tried all the troubleshooting steps from this link: http://hp.care/2iBCGv1 which I am sure you have, going by your seer technical expertise.
HP Technical Support can be reached by clicking on the following link: http://hp.care/2r9wSvP
- Once the support page opens please select the country in which you're located. Next, enter your HP model number on the right.
- Next, choose the 'Contact Support' tab at the top and scroll down to the bottom of the 'HP Support- Contact' page to fill out the form provided with your contact information.
- Once completed click the 'Show Options' icon on the bottom right.
- Lastly, scroll down to the bottom of the page and select 'Get phone number.' A case number and phone number will now populate for you.
They will be happy to assist you immediately.
If the unit is under warranty, the manufacturer’s warranty should take care of it for you.
Please perform all these steps patiently as it is critical to resolving the issue. The trick is to remain patient, Going by your technical expertise and competence I am sure you will be able to perform these steps without breaking a sweat.
Let me know how it goes and you have a great day!
To simply say thanks, please click the "Thumbs Up" button to give me a Kudos to appreciate my efforts to help. If this helps, please mark this as “Accepted Solution” as it will help several others with the same issue to get it resolved without hassles.
Take care and have a superb week ahead.