Flashing E4

[Deepti27]

HP Smart Tank720 flashing E4 error. Suggest a workaround

[Hawks_Eye]

Hi @Deepti27 

Welcome to the HP Support Community! We're here to help you get back up and running.

The E4 error code on an HP Smart Tank 720 typically indicates a problem related to the printhead or cartridge. Here’s a step-by-step guide to troubleshoot and potentially resolve the error:

Troubleshooting E4 Error on HP Smart Tank 720:

Check Printhead and Cartridge Installation:

• Open the printer’s access door.
• Wait for the printer carriage to stop moving.
• Ensure that the printheads are correctly installed. They should snap securely into their designated spots.
• Check the cartridges for compatibility and proper installation.

Clean Printhead Contacts:

• Remove the printheads from the printer.
• Use a lint-free cloth slightly moistened with distilled water to gently clean the electrical contacts on the printheads and the printer.
• Make sure they are dry before reinstalling them.

Reset the Printer:

• Turn off the printer.
• Disconnect the power cord from the printer and the wall outlet.
• Wait for about 60 seconds.
• Reconnect the power cord and turn the printer back on.

Reinstall Cartridges and Printheads:

• Remove the printheads and reinsert them, ensuring they lock into place.
• Close the access door and check if the error persists.

Verify Cartridge and Printhead:

• Ensure you are using genuine HP cartridges and printheads as third-party or refilled ones might cause compatibility issues.

These steps should help address the E4 error. However, if the problem persists, it may indicate a hardware issue.

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Regards, 

Hawks_Eye