52.00.00LaserJet Pro M404dnHas video

Fix Error 52.00.00 on HP LaserJet Pro M404dn: Laser Scanner

Error code 52.00.00 on the HP LaserJet Pro M404dn signifies a Laser Scanner Assembly failure. This occurs when the internal polygon mirror motor cannot accelerate to or maintain its required operating speed.

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Common causes

  • 1Polygon mirror motor failure inside the laser scanner unit.
  • 2Physical obstruction blocking the laser beam path.
  • 3Firmware glitch or corrupt initialization sequence on the main controller.
  • 4Loose ribbon cable connection between the laser unit and the formatter board.

Solutions

Steps to Troubleshoot Error 52.00.00 (Laser Scanner Fault)

The laser scanner writes the latent image onto the OPC drum. Perform these steps to diagnose the issue:

  1. Perform a Power Reset: Turn off the printer via the front power button, unplug the power cable for 5 minutes, and turn it back on to reset the main logic board.
  2. Check Toner Shutter Operation: Remove the toner cartridge and ensure the plastic protective shutter spring operates smoothly without blocking the optical path.
  3. Update Firmware: Connect the device via Ethernet and access the Embedded Web Server (EWS) to ensure the system is running the latest HP firmware update.
  4. Laser Unit Replacement: If the error persists accompanied by a high-pitched whine or humming sound during startup, the laser scanner assembly polygon motor has failed and requires replacement.

Steps to follow

  1. 1

    Power down and disconnect

    Turn off the printer, unplug the main power cord, and wait 5 minutes.

  2. 2

    Reseat the toner cartridge

    Open the access door, remove the toner cartridge, inspect the shutter, and firmly reinsert it.

  3. 3

    Power on and test

    Reconnect power and observe if the laser unit initializes during boot without error.

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Frequently asked questions

Usually no. While reinserting toner rules out shutter jams, Error 52.00.00 almost always points to an internal laser scanner motor fault.

Fix Error 52.00.00 on HP LaserJet Pro M404dn: Laser Scanner | Vimazdev