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Lexmark CX921

Lexmark CX921

121.45 error and/or firmware error 900.00 with machine check 121.45 message

Issue description

The printer posts 121.45 error message and/or firmware error [900.00] with machine check 121.45 message (as shown in the following image).

Solution

Perform the following steps to Reset Engine Service Error.

  1. Access the Diagnostics menu, and then navigate to: Printer setup > Reset Engine Service Error.

  2. Touch Start.

    Reset Engine Service Error setting clears a service error and restores the engine settings.

LEGACY ID: SO8716

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