One day old HP2820e printer. Display shows E3 all the time with flashing leds

[JMJM1]

Display shows E3 continuously.

Nothing in the troubleshooters works so far

Followed them as far as a system reset and now the LCD and the 4 leds just flash continuously

[A_Gayathri]

Hi @JMJM1,

Welcome to The HP Support Community.  

Thank you for posting your query, I will be glad to help you.

I understand the E3 error on your HP DeskJet 2820e All-In-One Printer indicates a paper jam or a carriage jam. Since you've tried the troubleshooters and performed a system reset with no success, let's try a few additional steps to resolve the issue:

Step-by-Step Troubleshooting for E3 Error

Turn Off and Unplug the Printer

• Turn off the printer and unplug it from the power source.
• Wait for about 60 seconds.
• Plug the printer back in and turn it on.

Check for Paper Jams

• Open the front and rear access doors.
• Carefully inspect for any paper jams or small pieces of paper that might be stuck.
• Remove any visible paper or debris.
• Use a flashlight to ensure there are no hidden pieces of paper.

Check the Carriage Path

• Open the printer’s ink cartridge access door.
• Ensure the carriage (the part that holds the ink cartridges) can move freely from side to side.
• If it’s stuck, gently move it to the center and clear any obstructions you find.
• Ensure there are no foreign objects obstructing the carriage path.

Clean the Rollers

• Turn off the printer and unplug it.
• Open the rear access door and clean the paper rollers with a lint-free cloth slightly moistened with distilled water.
• Ensure the rollers are free of dust and debris.
• Allow the rollers to dry before closing the access door and turning the printer back on.

Reinstall the Ink Cartridges

• Open the ink cartridge access door.
• Remove the ink cartridges and inspect them for any packaging material or protective tape that might not have been removed.
• Reinstall the ink cartridges and ensure they are seated properly.

Reset the Printer Again

• Turn off the printer and unplug it from the power source.
• Disconnect any connected cables (USB, Ethernet).
• Wait for 60 seconds.
• Plug the printer back in and turn it on.

Check for Firmware Updates Update the firmware on an HP printer

• Sometimes firmware updates can fix persistent error codes.
• Ensure your printer is connected to the internet.
• Go to the HP support website and check for any available firmware updates for your printer model.
• Follow the instructions to update the firmware if an update is available.

Refer to this document:  HP DeskJet 2820e All-in-One Printer User manual  
HP Printers - Carriage jam or E3 error

HP DeskJet 2800, 4200, 4900 Printers - Blinking lights and error codes

I hope this helps. 

Take care and have a good day.

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