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Printer Will Not Duplex (Print Automatically on Both Sides of the Page)

Document ID:SO3317

Usergroup :External


Printer will not print on both sides of the page; Not printing double-sided; Duplex option is not working


Duplex option; Optra family


  1. To be able to print on both the front and rear sides of the page, the printer needs to have a duplex option installed. If your printer does not have a duplex option installed, you will need to purchase one and install it onto the printer.  

  2. If your printer has a duplex option installed, check the driver/software settings. For instructions on how to check these settings, click here. These settings tell the printer how to print the page and will override any settings on the printer.

  3. Try printing again. If the printer still does not automatically print on both sides, confirm that the paper type selected on your printer corresponds to the media actually loaded into the printer.  Do this through the printer driver (Paper tab) as well as the printer operator panel (Paper Menu).  IMPORTANT:  Labels and transparencies will print on one side of the page only  (simplex) regardless of the printer or driver settings.  If the media type is set to Labels or Transparency, change the setting to allow for duplex printing.

  4. Try printing again.  If the printer still does not automatically print on both sides, confirm that the printer has detected the installed duplex option. To do this:

    1. Print the menu settings pages. 

    2. Look for a section called Installed Features on one of these pages.

    3. Confirm that the duplex option (Duplex) is listed in this section.

      - If the duplex option is listed, continue with Step 5 below. 
      - If the duplex option is not listed, do the following:

      1. Power off the printer and reseat the duplex option.

      2. Print the menu settings pages again.
        - If the duplex option is now listed, continue with Step 5 below. 
        - If the duplex option is still not seen by the printer, there is a problem with either the duplex option or the main printer. As service will be required to fix the problem, please contact Lexmark Technical Support or a local service provider.

  5. If the printer detects the duplex option but still will not print on both sides of the pages, you can set the Duplex setting in the printer menus to ON.   IMPORTANT! Doing this will cause the printer to duplex every  print job by default. You will need to change the Duplex setting back to OFF if you wish to print a single-sided job.

  6. Try printing again. If the pages are still not being printed on both sides and you have another printer of a similar model with a working duplex option installed, you can try swapping duplex options between the working printer and the non-working printer. 

      • If the problem follows the duplex option to the other printer, the duplex option will require service or a replacement.

      • If a working duplex option also fails on this printer, the printer will need service. 

  7. If the above steps do not resolve the duplexing problem, please contact Lexmark Technical Support for further assistance. 

Contacting Lexmark Technical Support
If you call Lexmark Technical Support for assistance with your printer, please be prepared to describe the problem you are experiencing, the message on the display, and any troubleshooting steps you have already taken. Please call from near the printer in case the technician asks you to perform a task involving the printer.
When calling for service, you will also need to know your printer model type and serial number. This information can be found on a label on the inside top cover of the printer. The printer serial number is also listed on the menu settings page(s) you can print from the operator panel.

  • For service in the U.S. or Canada, call 1-800-LEXMARK (1-800-539-6275). 

  • For service in other countries, please refer to the contact numbers listed on the Drivers CD.
    For more information, visit the Lexmark customer service site at

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