49.xy.zzHP Color LaserJet Enterprise M555dn

Fix 49.xy.zz Error HP M555dn: Firmware Guide

The 49.xy.zz error on the HP Color LaserJet Enterprise M555dn is a firmware exception error. It usually occurs when the printer processor receives an instruction it cannot interpret, often due to corrupt documents, incompatible drivers, or outdated firmware. The solution involves clearing the print queue and performing a forced reboot.

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Common causes

  • 1Volatile memory corruption caused by malformed print jobs.
  • 2Incompatibility between the installed PC driver and the current printer firmware.
  • 3Network conflicts when receiving multiple simultaneous print requests.
  • 4Wear of the capacitors on the main logic board (formatter).

Solutions

Diagnóstico rápido

This error typically appears during a print job reception or after an update attempt. If the display shows the 49 code followed by variable numbers, the system has detected an anomaly in the print driver data processing.

Solución paso a paso

  1. Cancel pending jobs: Turn off the printer and open the 'Print Queue' on your computer to delete all documents waiting to be printed.
  2. Full reboot: Disconnect the printer from the network (Ethernet/Wi-Fi) and power it on alone to check if the error persists without data connection.
  3. Update Firmware: If the printer starts correctly, download the latest firmware version from the official HP website and install it via USB.
  4. Reinstall Driver: Replace the current controller on your PC with the HP Universal Print Driver to ensure total compatibility.

Prevención y mantenimiento

  • Frequent updates: Schedule a quarterly firmware check via the printer's Web Services (EWS) interface.
  • Network cleanup: Avoid overloading the equipment's memory by sending excessively large PDF files or those with non-standard fonts.
  • Connection quality: Use category 6 Ethernet cables to ensure stable data transmission and avoid packet corruption.

Cuándo llamar a un técnico

If after updating the firmware and performing an 'NVRAM Init' (factory reset), the 49 error still appears while disconnected from the network, the issue lies in the Formatter Board and requires professional service.

Ficha técnica del equipo

  • Technology: Advanced laser processing
  • Firmware: HP FutureSmart
  • Connectivity: Gigabit LAN, HP Jetdirect
  • Processor: 1.2 GHz
  • Compatible consumable: HP 212A / 212X (M555 series)
  • Recommended usage: Complex document printing in corporate networks
  • Official drivers / firmware

Steps to follow

  1. 1

    Clear queue

    Delete all pending documents from your PC's print folder.

  2. 2

    Isolate network

    Disconnect the network cable to rule out corrupt data packets.

  3. 3

    Update firmware

    Install the latest firmware from the official support website.

Frequently asked questions

Not necessarily. Most of the time it's a software or communication error that is solved by restarting or updating.

If it prevents printing, yes. Although not an immediate physical failure, a persistent firmware error can harm internal memory if ignored.

Toner doesn't cause 49 errors, but always use original HP 212A/212X consumables to maintain system integrity.

It is recommended to check for updates every 6 months for security patches and driver compatibility.