31-missing-tonerE250dn

Lexmark E250dn error 31 missing toner: Fix

The Lexmark E250dn error 31 missing toner indicates that the internal sensor cannot detect the presence or communication of the toner chip. This consumable error is often caused by poor seating of the cartridge or dirt on the chip contact points. A proper re-installation usually resolves the fault.

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Common causes

  • 1Toner chip dirty or covered in dust.
  • 2Cartridge improperly seated in guide rail.
  • 3Bent toner reader pins inside printer.
  • 4Defective chip in third-party compatible cartridges.

Solutions

Diagnóstico rápido

If you see the '31 Missing Toner' warning, the machine has lost electrical linkage with the cartridge chip. Why does my Lexmark show error 31 missing toner? Often occurs after a change where the toner didn't snap into the guide rails properly.

Solución paso a paso

  1. Opening: Open the front cover and extract the cartridge entirely.
  2. Cleaning: Use a soft dry cloth to clean the gold contacts on the cartridge chip.
  3. Reinstallation: Insert the cartridge back, pushing until it locks in place.
  4. Verification: Close the cover and wait for the main panel to clear.

Prevención y mantenimiento

Buy original toner to ensure the chip is recognized correctly. Do not force the cartridge to avoid damaging the printer's toner reader pins.

Cuándo llamar a un técnico

If the error 31 persists after trying different cartridges, the internal toner reader might be misaligned or damaged, requiring professional technical support.

Ficha técnica del equipo

  • Technology: Monochrome Laser
  • Speed/Performance: 30 ppm
  • Connectivity: USB, Ethernet
  • Paper capacity: 250 sheets
  • Consumable: E250/E350 cartridges
  • Recommended use: High volume offices
  • Official Drivers / Firmware

Steps to follow

  1. 1

    Remove

    Open the cover and fully extract the toner cartridge.

  2. 2

    Clean

    Wipe the toner's metallic contacts with a dry cloth.

  3. 3

    Reinstall

    Insert the cartridge making sure it clicks into place.

Frequently asked questions

The printer cannot read the toner chip, usually due to a poor connection.

No, error 31 stops printing until the consumable is successfully detected.

Use E250/E350 series to ensure compatibility with detection systems.

Usually, it's temporary and resolved by reinstalling the cartridge.