49.4CLaserJet Pro M118dw

HP LaserJet Pro M118dw error 49.4C: Technical fix

The HP LaserJet Pro M118dw error 49.4C is classified as a communication failure between the printer's firmware and hardware. This message appears when the logic board cannot properly process a print command or network instruction. Understanding how to fix error 49.4C on LaserJet Pro M118dw primarily involves restoring system software stability.

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Common causes

  • 1Firmware failure preventing task processing.
  • 2Local network IP address conflict (unstable DHCP).
  • 3Corrupt print job saturating the memory buffer.
  • 4Outdated firmware incompatible with newer OS versions.

Solutions

Quick Diagnosis

The 49.4C code is triggered by network conflicts or corrupt print jobs that the processor cannot interpret. If the error appears immediately upon startup, it is a firmware-level fault; if it appears when sending a job, the PC print queue is likely the issue.

Step-by-step Solution

  1. Disconnect networking: Disconnect the Ethernet cable or disable Wi-Fi to prevent interference during restart.
  2. Power cycle: Turn off the printer and wait 60 seconds before turning it back on.
  3. Update firmware: Visit the official website and download the latest firmware update to ensure stability.

Prevention and Maintenance

Always keep the printer firmware updated to the latest version. In office networks, assigning a static IP address to the printer significantly reduces the 49.x communication errors caused by DHCP conflicts.

When to Call a Technician

If firmware updates fail to resolve the issue and the error persists upon startup, the formatter board may be faulty and require professional replacement.

Technical Specifications

  • Technology: Laser
  • Print Speed: 30 ppm
  • Connectivity: Wi-Fi, Ethernet, USB
  • Paper Capacity: 250 sheets
  • Consumable series: HP 94A/X
  • Recommended Use: Professional office
  • Official Drivers / Firmware

Steps to follow

  1. 1

    Disconnect networking

    Disconnect the Ethernet cable or disable Wi-Fi to prevent interference during restart.

  2. 2

    Power cycle

    Turn off the printer and wait 60 seconds before turning it back on.

  3. 3

    Update firmware

    Visit the official website and download the latest firmware update to ensure stability.

Frequently asked questions

This error points to an internal or firmware conflict that interrupts the printer's communication tasks.

It usually clears with a restart, but recurrent errors require a critical firmware update to prevent mainboard issues.

Always use genuine HP 94A or 94X supplies to ensure the firmware does not report chip communication errors.

Avoid powering off the printer during firmware updates and keep the unit updated via HP Smart tools.