900.03mb2338i

Lexmark MB2338i error 900.03: RAM Failure

The Lexmark MB2338i error 900.03 indicates that the system has detected a fault in the internal RAM registers. This prevents the printer from successfully loading its internal OS, resulting in a total panel lock upon startup.

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Common causes

  • 1Physical RAM module read error.
  • 2Internal processor overheating.
  • 3Damage to the main system board.
  • 4Electrical surge impacting memory chips.

Solutions

Diagnostic

If this error appears without active print jobs, a physical memory chip on the system board is likely malfunctioning or overheating.

Step-by-step resolution

  1. Power off the device.
  2. Disconnect all network and USB cables.
  3. Wait a few minutes and power on only with the power cable.
  4. If the error remains, the memory module has failed.

Prevention and maintenance

Avoid running the printer in environments with high heat. Clean rear cooling fans regularly to protect the logic board.

When to call a technician

This error almost always necessitates the replacement of the main logic board, as the RAM is soldered to the board itself.

Equipment data

  • Technology: Monochrome Laser
  • Speed: 38 ppm
  • Connectivity: USB, Gigabit LAN
  • Consumable: MB2338i cartridges
  • Official support

Steps to follow

  1. 1

    Shutdown

    Power off the printer.

  2. 2

    Unplug

    Remove all network cables.

  3. 3

    Restart

    Power on without network connection.

Frequently asked questions

A failure in internal RAM access.

Yes, it is a hardware memory failure.

MB2338i series consumables.

Keep vents clean to avoid overheating.

Lexmark MB2338i error 900.03: RAM Failure | Vimazdev