Hi ewingco,
Welcome to the HP Forums.
I see you are experiencing an issue with the printer getting a error message "Turn the power off" and freezes.
I will do my best to assist you with this issue.
I have provided a document to go through the steps to see if it will resolve this issue.
The HP Printer Turns Off Repeatedly.
Hope this helps.
Thank you for posting on the HP Forums.
Have a great day.