Same problem. Wont charge or turn on. So the next thing I tried is removing and reincerting my SD card. Wala...it started charging and working. Hope this doesn't happen ever time I try and use the Gear 360 2017.
Don't know if Samsung can do a firmware update to the unit but seems to be a OS/firmware peoblem.
Samsung;;;you have a problem!
I did finally contact Samsung support. Their only suggestion was to try a different charger (which I did, even though I knew the charger was good), so I returned the 360. Its replacement should be arriving soon. Hopefully the last one was just a lemon.