Hi AMLW.
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
Sorry to hear that you are having issue with the printer not functioning. I see that you have unplugged the power and plugged it back in. Are you connecting the printer to a Power bar/strip or directly to a wall outlet? Here is a document on the Issues when Connected to an Uninterruptible Power Supply/Power Strip/Surge Protector.
Here is a link to the HP Part Surfer just in case you would like to purchase a new power adapter.
Thank you for your time.