Hi Gerri_31,
I understand you aren't able to shut down the printer with the power button.
Thank you for your reply.
I will be happy to help you with this.
I would do a power reset to see if that will resolve the issue. With the printer still turned on, disconnect the power cable from the back of the printer, hold the power button for 10 seconds to drain any power, if the printer has external power module with a detachable power cord disconnect it for 15 seconds and then reconnect it. Then disconnect the power cable from the wall outlet. Wait 10 seconds and reconnect the power cable back to the wall outlet first, then the back of the printer and power it on again.
Make sure the printer is connected directly to wall outlet. (don't use a power hub or a surge protector)
I have provided a document for power issues.
The HP Printer Won't Turn On or Respond.
If these steps don't resolve the issue I would recommend to call HP Tech Support for
further assistance to see what other options are available for you or to find out about
the trade in and trade up program.
Hope this helps.
Thank you for posting on the HP Forums. Have a great day!