Hi t.spett
Thank you for using the Xerox forum.
I would suggest that you review the following site and check to see if the various solutions may help you. Xerox 9303 Product Support
I searched for "firmware update failed" and got many possible solutions.
including :Manually Update the Machine Software (Firmware) Using CentreWare Internet Services (CWIS)
If that does not resolve your issue you may consider contacting our specific product support experts at the following link:
Fast Track to the Expert