@NorthernJP, Welcome to HP Support Community,
Thank you for posting your query; I’m here to help by guiding you through steps to resolve this issue
Restart the Printer
1. Turn off the printer.
2. Unplug the power cord from the back of the printer.
3. Remove the cartridges.
4. Press and hold the power button for 30 seconds.
5. Plug the power cord back in.
6. Wai for few minutes and then insert the cartridges (let printer prompt for cartridges)
7. Turn on the printer
I hope these steps help resolve the issue
Please feel free to reply here if you have any questions or if you need further clarification on any of the steps.
Take care and have a good day.
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Regards,