HP DeskJet 2720 all lights blink withh Error EE

[Raheel11]

Printer stop working and while restarting it continue flashing power button, cancel button, insert page button, information button together with all display icons on display panel

tried following options but none works

- Soft restart by pressing cancel and insert page button for a min 

- hard restart by power button and cancel button with plug of/on 30 sec delay 

Serial number:

[Personal Information Removed]

Product Number:

3XV18B

[KrazyToad]

@Raheel11

Welcome to HP Support Community

I would like to help

Please try these steps

- Turn on the printer.
- Wait until the printer is idle and silent before you continue.
- Disconnect the USB cable from the rear of the printer. If your printer has a network or wireless connection, leave it connected.
- Remove the ink cartridges from the printer and clean the electrical contacts with a lint free cloth
- With the printer turned on, disconnect the power cord from the rear of the printer and from the wall outlet or power strip.
- Wait at least 60 seconds.
- Plug the power cord back into the wall outlet.
NOTE: HP recommends connecting the printer power cord directly to a wall outlet.
- Reconnect the power cord to the rear of the printer.
- Turn on the printer, if it does not automatically turn on.
- The printer might go through a warm-up period. The printer lights might flash, and the carriage might move.
- Wait until the warm-up period finishes and your printer is idle and silent before you proceed.
- Reinsert the ink cartridges, and then close the ink cartridge access door.
- If you receive a prompt to print a calibration page, do so.
 
Also ensure the printer has the latest Firmware https://support.hp.com/in-en/document/c02919168

If the issue persists please contact HP Support in your region for service options

1) Click on this link - www.hp.com/contacthp/ 
2) Select your product type below.
3) Enter the serial of your device. 
4) Select the country from the drop-down. 
5) Select the chat or get phone number options based on your preferences. 
6) Fill the web-form and proceed further.

Thank you

If the information I've provided was helpful, give us some reinforcement by clicking the "Solution Accepted" on this Post and it will also help other community members with similar issue.