HP Enterprise - Use Cloud-based HP Online Help to Troubleshoot Printing

HP LaserJet Enterprise printers and HP Officejet Enterprise printers have cloud-based Online Help available to troubleshoot printing issues. HP Online Help users can scan a QR code on the printer display using a mobile phone or tablet, or click an error-specific link in the Event Log of the Embedded Web Server, to automatically retrieve the most relevant and up-to-date information or video to help resolve the issue at the control panel.
Use Cloud-based HP Online Help to Troubleshoot Printing c04672002
Setup and Configure Cloud-based HP Online Help  c04671899
https://www.youtube.com/watch?v=IZyuyDz0Nz0
 

Hi @Sunshyn2005
I timed-out waiting for advice, and contacted HP Support, who helped me get the printer back on the air.  While we didn't manage to root-cause it, in the course of trying various things, the tech disabled Norton 360's firewall, which then allowed connecting to the printer, and restoring print service, which remains up after re-enabling the firewall. 
The timing of the disconnection doesn't neatly corellate with any Windows updates.  My own theory is that it was caused by a 360 update, but am unable to find a smoking gun, since 360 doesn't provide update history.  The exact root-cause remains a mystery, but at least provides another thing for folks to try should they find themselves in similar straits.
I really appreciated your hint that a Windows update might be the root cause, and your pointing out how to review the history and back-out updates: this morning, I found that Windows had installed a batch of updates overnight, and found that no browsers worked.  Using your advice, I rolled back the update, restoring browsing.
Thanks,
-rjs

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