Have you pulled the SD card inside the unit and had a look at the files on there?
It is pretty enlightening regarding the configurations for where data is sent, and how. I didn't dig too deep because my issue is lower level, but saw some promising information.
I would recommend imaging your SD card, backing that up, confirming you can write a new working one from that backup, then start playing

Make sure you power the unit off before opening it up, lots of exposed mains voltage in there.
Leave a comment: