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Lexmark MS421

Lexmark MS421

How to Update Printer or MFP Firmware Using Wi-Fi Direct Connection (March 2020)

Affected Products:

Single-Function (SFP):

B2865dw, B2650dw, B2546dw, B2442dw, B2338dw, B2236dw, C2535dw, C2425dw, C3326dw, C3224dw

Multifunction (MFP):

MB2770adwhe, MB2650adwe, MB2546adwe, MB2442adwe, MB2338adw, MB2236adw, MB2236adwe, MC2640adwe, MC25335adwe, MC2425adw, MC3326adwe, MC3224adwe/dwe, MC3224i, MC3326i, MC3426i


  1. Download the applicable firmware from or another Lexmark provided site to the laptop.

  2. Boot the printer and enable WiFi Direct® in the printer. From the control panel, navigate to: Settings > Network/Ports > Wireless > Enable Wi-Fi Direct. For non-touch-screen printer models, press OK to navigate through the settings.

    This step will generate wireless SSID and default PSK (password) automatically. Allow the preshared key (PSK) to be displayed on the printer network set-up page. From the control panel, navigate to: Settings > Network/Ports > Wi-Fi Direct > Show PSK on Setup Page.

    Print the network Setup page. SSID and PSK will be displayed on printed Network Setup Page. From the control panel, navigate to: Settings > Reports > Network > Network Setup Page.

    SSID name and PSK will be listed in Wi-Fi Direct Section of Network Setup Page Report.IMPORTANT!: The SSID and PSK can be changed from the printer menus if desired. Please see the Wi-Fi Direct Users Guide.

  3. From the Wi-Fi enabled laptop, temporarily connect to the broadcst SSID created from enabling Wi-Fi Direct on the printer.
    This will cause internet access on the laptop to be unavailable temporarily. From the laptop, select the printer's broadcast SSID from the list of Wi-Fi networks.IMPORTANT!: The printer SSID will have a string appended to the beginning. "DIRECT-XX" (XX are two random characters) is added before the SSID shown on the Network Setup Page. When promted on the laptop, enter the PSK listed on the network setup page for the password.

  4. From the laptop, open a browser (Firefox, Chrome, etc) and enter the address http://10.194,46,227.

  5. Update the printer firmware from the laptop to the printer via the Embedded Web Server.

    • From the Embedded Web Server, click Settings > Device > Update Firmware.

    • Browse to locate the required flash file.

    • Apply the changes.

  6. After firmware is successfully sent to the printer, you can reconnect your laptop back to your normal Wi-Fi connection. If normal infrastructure Wi-Fi connection on the printer was correctly setup previously, it should automatically reconnect. If not, proceed with the normal Wi-Fi setup procedures.

Still Need Help?

Have the following available when calling Lexmark Technical Support;

  • Printer model(s)

  • Printer serial number


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