Tray empty or open error message

[KenReagan]

 that's the error message 

But the tray is in and loaded

Even when I pull out the tray it's not recognized 

 that's the constant message regardless all the restarting cleaning etc

[Echo_Lake]

@KenReagan

Thank you for posting on HP Support Community.
 

Don't worry as I'll be glad to help, I have a few troubleshooting steps we could try to fix the issue:  

Reset the printer to recover from printer errors or failures.

1. If your printer has a rechargeable battery, remove it.

2. With the printer turned on, disconnect the power cord from the printer.

3. Unplug the power cord from the power source.

4. Wait 60 seconds.

5. Reconnect the power cord to a wall outlet and to the printer.

   NOTE: 

   HP recommends plugging the printer directly into a wall outlet.

6. Turn on the printer to complete the reset.

If the issue persists, follow the next steps from here: https://support.hp.com/in-en/product/hp-officejet-pro-7720-wide-format-all-in-one-printer-series/768...

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.