900.00MS812dn

Error 900.00 Lexmark MS812dn: System Exception Fix

The lexmark ms812dn error 900.00 is a generic system exception indicating that the printer's main controller board has encountered an unrecoverable error during its operation. This often relates to software conflicts, such as attempting to print corrupted data or a mismatch between the document language and the printer's internal firmware. While intimidating, it can often be cleared by flushing the print queue and ensuring the firmware is fully up-to-date.

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Common causes

  • 1Data corruption in a print job.
  • 2Incompatibility with network-based printer drivers.
  • 3System firmware bug.
  • 4Hardware failure of the main logic controller board.

Solutions

Quick Diagnosis

If your MS812dn displays error 900.00, it is essentially a 'kernel panic' for your printer. If the error occurs during boot, it is a software or board issue; if it occurs during printing, it is likely due to the specific document being sent from your computer.

Step-by-Step Solution

  1. Clear Print Queue: Delete all pending print jobs from the computer's print spooler.
  2. Hard Power Cycle: Disconnect the unit from the power source for 5-10 minutes to drain the capacitors.
  3. Factory Reset: Use the control panel menu to perform a factory reset of the printer settings.
  4. Update Firmware: Download the latest firmware image from the official Lexmark site and flash the system via the USB port.

Prevention and Maintenance

Keep your printer's firmware updated to ensure full compatibility with modern network environments. Avoid attempting to print extremely large or corrupted PDF/image files which could trigger memory overflows leading to this exception error.

When to Call a Technician

If the 900.00 error appears immediately upon powering on despite multiple attempts at re-flashing the firmware, the system board is likely physically damaged and requires replacement.

Technical Specifications

  • Technology: Monochrome Laser.
  • Performance: Up to 70 ppm.
  • Connectivity: Gigabit Ethernet, USB.
  • Compatible Consumables: Lexmark 52D / 520 series.
  • Usage Profile: High-volume workgroup printing.
  • Official Drivers / Support

Frequently asked questions

It is a firmware exception error. It usually happens when the printer controller encounters data it cannot interpret or a system crash occurs.

Yes, clearing print queues and updating the firmware usually resets the internal system state.

The MS812dn uses Lexmark 520 or 521 high-yield toner series.

Regular firmware updates and avoiding sending extremely complex file formats can help stabilize the printer.