Thank you for posting on HP Support Community.
Don't worry as I'll be glad to help,
I appreciate your efforts to try and resolve the issue. If you have already performed the steps from the document Print head Errors: https://support.hp.com/in-en/document/c04100778 and the issue persists, it could be a hardware failure.
Please reach out to HP Support in your region regarding the service options for your printer. HP Support can be reached by clicking on the following link: www.hp.com/contacthp/
Hope this helps!
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