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Try to install the firmware with "Xerox VersaLink Windows Firmware Download Utility Tool" with USB cable, from here https://www.support.xerox.com/support/versalink-c400/downloads/enus.html?operatingSystem=win7x64&fil...
I was using the UI console on the device to update the firmware. It went to an orange warning saying write error. Now when i try to power it on, the UI is blank and i can't access the embedded web server. Is there anyway to manually reset the printer without the UI or we server? Or flash the firmware onto the device(USB cable or via usb stick)?