@isak please could you advise any extra steps I could try like clearing/manual resetting the microcontroller to enable connection, or if any of the configuration solder links might affect connection?
Alternatively I have access to an electronics lab if you could guide me through firmware update using JTAG/Atmel studio if this is an option. My soldering should be good enough if this is possible.
I would also be happy to trade my controller in for a micro-usb or usb-c model.
Thank you