55.00.00LaserJet Pro M404dn

Error 55.00.00 HP LaserJet Pro M404dn: Maintenance Guide

Error 55.00.00 is a communication alert in the DC Controller of the HP LaserJet Pro M404dn. This component is the printer's brain that manages motors and print cycles. When the controller stops receiving feedback from internal components, it locks for safety to prevent electrical damage.

1 views

Common causes

  • 1Voltage spike that affected the integrity of the controller board.
  • 2Poorly connected or faulty DIMM memory.
  • 3Persistent error in the firmware operating system.

Solutions

Static Power Cycle

  1. Turn off the printer and disconnect the power cable.
  2. Hold the power button for 45 seconds while the printer has no power.
  3. Reconnect and turn on.

Memory Verification

  1. Remove any additional accessories (extra RAM or USB peripherals).
  2. Attempt to start the printer with only the power cable connected.

Steps to follow

  1. 1

    Energy Isolation

    Unplug the printer and let it discharge.

  2. 2

    Peripherals Check

    Disconnect non-original accessories that may cause interference.

  3. 3

    Boot Test

    Turn the unit on in a clean state to verify if the error persists.

Frequently asked questions

It is not dangerous, but it prevents you from using the printer. It is a protective measure of the machine itself.

Using a voltage regulator or an uninterruptible power supply (UPS) is the best way to protect the DC controller.

If a reboot doesn't work, the DC controller board likely requires a physical replacement by a certified technician.

Error 55.00.00 HP LaserJet Pro M404dn: Maintenance Guide | Vimazdev