OW_400ENVY Photo 7855

HP ENVY Photo 7855 error OW_400: Network connection fix

The HP ENVY Photo 7855 error OW_400 is a common issue involving wireless network connectivity. This code appears when the device attempts to associate with the router but fails, or when there is an IP conflict. It is the primary reason why wireless printing jobs fail.

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Common causes

  • 1Incorrect Wi-Fi password stored after router changes.
  • 2Electromagnetic interference from other electronic devices.
  • 3DHCP IP address exhaustion in the local network.
  • 4Incompatibility with WPA3 encryption standards.

Solutions

Diagnóstico rápido

Error OW400 is often accompanied by an orange blinking Wi-Fi icon. When users search why is my HP ENVY Photo 7855 showing error OW400, it usually points to a network handshake failure or outdated IP settings.

Solución paso a paso

  1. Restart Peripherals: Power off both the router and the printer. Wait 30 seconds, then turn on the router first, followed by the printer.
  2. Check Wi-Fi Band: Ensure the network is 2.4 GHz, as this model may struggle with 5 GHz-only configurations.
  3. Reset Network Settings: Navigate to Settings > Network Settings > Restore Network Defaults and confirm.
  4. Reconfigure Connection: Use the Wi-Fi setup wizard on the touch panel to search for your network and re-enter the password.

Prevención y mantenimiento

Keep the router within 5 meters of the printer and ensure no heavy obstructions exist. Assigning a static IP address for the printer within the router settings can prevent the OW_400 error from returning.

Cuándo llamar a un técnico

If factory resetting the network settings fails to resolve the issue, the internal wireless module may be damaged.

Ficha técnica del equipo

  • Technology: Thermal Inkjet.
  • Performance: 15 ppm black / 10 ppm color.
  • Connectivity: Wi-Fi 802.11b/g/n, Bluetooth LE.
  • Tray capacity: 125 sheets.
  • Compatible consumables: HP 64 series (N9J92AL).
  • Recommended use: Home use.
  • Official drivers / firmware

Steps to follow

  1. 1

    Restart Peripherals

    Power off both the router and the printer. Wait 30 seconds, then turn on the router first, followed by the printer.

  2. 2

    Check Wi-Fi Band

    Ensure the network is 2.4 GHz, as this model may struggle with 5 GHz-only configurations.

  3. 3

    Reset Network Settings

    Navigate to Settings > Network Settings > Restore Network Defaults and confirm.

  4. 4

    Reconfigure Connection

    Use the Wi-Fi setup wizard on the touch panel to search for your network and re-enter the password.

Frequently asked questions

This error means the printer cannot establish a valid connection with the access point, often due to incorrect credentials or channel congestion.

It is not urgent for physical printing, but prevents wireless operations from mobile devices or PCs.

It uses the HP 64 series. Using original cartridges is essential to avoid communication issues with the system.

We recommend checking for updates monthly via the HP Smart app to ensure full network protocol compatibility.