400-04MC873dnfax

OKI MC873dnfax error 400-04 Fix

The OKI MC873dnfax error 400-04 is a communication error code indicating that the printer cannot properly handle an incoming network request. This often occurs due to a timeout during large data transfers or security restrictions in the office network. Reviewing IP settings usually resolves it.

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Common causes

  • 1Network firewall restrictions blocking MFP traffic.
  • 2Printer IP conflicting with another device on the network.
  • 3Timeout triggered by extremely large print files.
  • 4Switch configured to block devices not complying with specific protocols.

Solutions

Quick Diagnosis

If you try to print and the queue stays at 'Sending' until showing error 400-04, the connection is blocked by a security policy or timeout.

Step-by-Step Solution

  1. Power Cycle: Power down the MFP and the network switch to flush temporary interface states.
  2. Ping Test: Open CMD on your PC and type 'ping [IP_Printer]'. If it fails, the IP has changed or there is a network block.
  3. Network Filters: Check if any firewall software on the PC is blocking communication with the OKI print port.
  4. Network Reset: Access the network panel on the printer screen and run a 'Reset Network Parameters'.

Maintenance and Prevention

Avoid changing the printer's IP address after user software installation. Use enterprise-grade network gear to prevent communication conflicts.

When to Call a Technician

If you reset network settings and use a new cable but the error persists, the main logic board may require replacement.

Technical Specs

  • Technology: Digital LED multifunction.
  • Speed: 35 ppm.
  • Connectivity: Gigabit LAN, USB, Fax.
  • Capacity: High durability for large offices.
  • Compatible Consumables: MC873 toner (458071xx).
  • Usage: Corporate environments.
  • Official Support and Drivers

Steps to follow

  1. 1

    Restart

    Power off the device to clear temporary states on the network card.

  2. 2

    Ping Test

    Ping the printer IP from a PC to verify connectivity.

  3. 3

    Check config

    Verify if there are firewall restrictions or filters in your local network.

Frequently asked questions

This error signifies the device cannot complete a print request due to a timeout with the network server.

If the Ethernet port light isn't flickering while sending documents, it is a clear sign of physical cable failure.

No relation; error 400-04 is a logic communication error.

OKI multifunction devices require preventative maintenance every 100,000 prints by certified technicians.