Hi @John470
Welcome to the HP Support Community. I'd be happy to assist you with the password issue.
To better assist you - What's the make and model of the router?
While you respond to that, please try updating the printer's firmware - HP Printers - Updating or Upgrading Printer Firmware
Hope this helps! Keep me posted.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!
Have a great day!
Asmita
I am an HP Employee