e4HL-L2350DW

Brother HL-L2350DW error E4: Network Problem

The Brother HL-L2350DW error E4 informs of a problem with wireless connectivity. This message appears when the printer cannot authenticate with your network router or the signal strength is too low. Below, we explain how to restore the Wi-Fi link easily.

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Common causes

  • 1Changed Wi-Fi password.
  • 2Strong electromagnetic interference.
  • 3Router DHCP conflict.
  • 4Failed wireless network module.

Solutions

Quick Diagnosis

If your mobile devices cannot find the printer, E4 is the likely culprit. Check if the Wi-Fi indicator on top is flashing or dark.

Step-by-Step Solution

  1. Verify: Check if other wireless devices connect to the internet fine.
  2. Reset: Enter the 'Network' menu and choose 'Reset' to clear existing parameters.
  3. Sync: Press the WPS button on the router and then on the printer.
  4. Confirm IP: Print the network test page to confirm the new IP address.

Prevention and Maintenance

Do not place the printer inside metal cabinets or near microwave ovens, which interfere with 2.4 GHz. If possible, set a static IP in the settings.

When to call a technician

If the wireless card fails to detect any network, even near the router, the internal Wi-Fi module might be faulty.

Device technical specifications

  • Technology: Laser monochrome
  • Speed: Up to 36 ppm
  • Connectivity: Wi-Fi, USB
  • Feeding capacity: 250 sheets
  • Compatible media: TN-730 / TN-760
  • Usage: Home/Small Office
  • Official drivers / firmware

Steps to follow

  1. 1

    Check router

    Ensure your router is broadcasting a strong Wi-Fi signal.

  2. 2

    Reset network

    Go to the menu and select 'Reset Network' to clear old settings.

  3. 3

    Reconnect

    Use the WPS button on your router for quick synchronization.

Frequently asked questions

This error means the printer has lost the connection to the wireless access point or contains incorrect network data.

USB is more stable if the printer is far from the router, but E4 is specific to Wi-Fi mode issues.

Regardless of error, always use original TN-730/TN-760 toners to avoid redundant warnings.

Assign a static IP from the printer's web config page to avoid constant re-negotiations with the router.

Brother HL-L2350DW error E4: Network Problem | Vimazdev