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A 900.94 Firmware Error Appears While Receiving a Fax on Lexmark MFPs

Document ID:SO5403

Usergroup :External


900.94 error; 900 error; 900.44 error; Fax queue back log; Faxes will not print due to error; Printer freezes; Device locks up when receiving a fax; Fax receive 900 error; Problem receiving faxes;


What you will see

A 900.94 Firmware Error displays on the MFP while receiving faxes.

NOTE: A possible corrupt fax job that affects the fax print process may be what generates this error.


Recommended action

Should you get a 900.94 Firmware Error, please perform the following:

Step Action

An update to the latest firmware is recommended.

Note: Click here to view an article on how to download the latest printer firmware. Please see the section below to check your current firmware level. You may contact Lexmark Technical Support to verify the firmware code compatible with your device.


Gather a Report a Fax Problem log.

a.  Open printer's Web interface.

To do this:

  • Open a Web browser; e.g., IE, Mozilla Firefox, Google Chrome.
  • Enter the printer's IP Address followed by /se, e.g.,
  • Press Enter.

b.  Select Report a Fax Problem.

c.  Fill out the Fax Event Checklist with necessary information, and then click the Submit button.

d.  Save the file; e.g., checklist.html.

Note: A copy of this log is required should the issue persist or further recommendation be required. This applies to Network-connected devices only.


How to check device Base Code Firmware Level

You may use either Options 1 or 2 for ways to determine printer firmware code levels.

Option 1

Print the Menu Settings Page. Do this from the printer's operator panel:

Step Action
1 Press the Menu button on the Control Panel.
2 Select Reports.
3 Print the Menu Settings Page.

Note: The printer should read ‘Printing Menu Settings Page’ and the menu settings page(s) should print out.

4 Check the code level under the Device Information section on the menu settings pages.

Option 2

Access the printer's Embedded Web Server (EWS). Before you begin, a functional network installation (wired or wireless not a local USB installation) is required for access to the web server of any Lexmark network printer.

Step Action
1 Determine the print server's IP address within the printer/MFP.
2 Launch your preferred web browser application (e.g., Firefox, Safari, Internet Explorer).
3 In the address field after the http://, enter the printer's IP address (e.g., or
4 Click on Reports.
5 To check for the code level, click on Device Information.


Click Image to Enlarge

IMPORTANT! Please verify the existence of any of the following under Device Information. These downloadable language emulators (DLEs) require special firmware.

  • Bar Code
  • IPDS
  • PrintCryption
  • Forms
  • Prescribe
  • ImageQuick


Related articles

Need help updating firmware?
Click here for an extensive list of firmware update articles. 

Other 900 errors? Click here to perform your own preliminary diagnosis.


Still Need Help?

Please contact Lexmark Technical Support for additional assistance regarding this issue. NOTE: When calling for support, you will be asked for your printer model type and serial number (SN).

Please call from near the computer and printer in case the technician on the phone asks you to perform a task involving one of these devices.


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