Hello farinc,
Sounds like you have tried everything already, so it would be a hardware escalation: 1-800-821-2797 or 1-800-835-6100
I have a Xerox 6128 MFP and it presented the following message on the screen today and I am not able to remove it and make my printer work again. Any ideas in resolving this error code would be appreciated. I have turned off the printer and waited more than 10 seconds to turn it back on but the same error appears. I also tried to use the control panel to access the fax set up to set the country code but I'm not able to do anything with the control panel. Any advice would be helpful as I'm not able to find any solution. Thank you.
MFP NVM Error
Error 117 - 363
Restart Printer