E9HP DeskJet 2720

Fix HP DeskJet 2720 Error E9: Firmware Update Failure

Error code E9 on the HP DeskJet 2720 signifies a failure during the firmware update process. When the printer fails to complete this, it enters a protective state to prevent permanent damage to the logic board. Follow these steps to restore stability.

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Common causes

  • 1Unstable Wi-Fi connection during firmware download.
  • 2Unexpected power interruption during the writing phase.
  • 3Corrupted data in the printer's cache memory.

Solutions

Network Reset

  1. Unplug both the router and the printer.
  2. Power on the router first and verify internet connectivity.
  3. Turn on the printer so it can re-attempt the update.

Manual USB Update

  1. Download the latest firmware from the official HP support site.
  2. Connect the printer via USB cable to your computer.
  3. Run the update tool from your OS.

Steps to follow

  1. 1

    Preparation

    Turn off the printer and disconnect any USB cables.

  2. 2

    Hard Reset

    Hold down the Cancel and Wi-Fi buttons while turning the printer on.

  3. 3

    Configuration

    Wait for the power light to blink, then reconfigure the network settings.

Frequently asked questions

The update process does not affect your documents, only the internal printer control software.

It usually happens due to a Wi-Fi signal drop or a power surge during the critical writing process.

Very rarely; most issues are resolved by retrying the update using a stable USB wired connection.

Fix HP DeskJet 2720 Error E9: Firmware Update Failure | Vimazdev