Hi @scj73,
Welcome to the HP Support Community!
Thanks for posting your query! We're here to help you get back up and running.
Superb description and stupendous diagnosis of the issue before posting. Kudos to you for that. 😊
Click on the link below to watch a video which provides step-by-step instructions on how to troubleshoot and fix a '0x6100004a' error message on HP Officejet All-in-One printers.
This error can occur after a paper jam.
Follow the steps to resolve the issue and ensure your printer is functioning properly.
https://players.brightcove.net/1160438706001/ByLWUi0A_default/index.html?videoId=ref:REFIDNS37195894
If this solution hit the spot, please come back and click "Accepted Solution" to help others find the answer. And if you'd like to say thanks, select "Yes" on the bottom left of the public post, as that would make our day!
Take care, and have an amazing day!
Regards,
Vince_0406