Hi! I had this problem and I finally solved it. More likely, you have installed firmware version 5 (V05,00). That version has a bug that makes your camera useless after few days. Also, the camera overheats when the battery is in (or USB charger). You cannot power on the camera, you cannot install another firmware upgrade (or downgrade), the camera is dead. But I found this guy that made a program that can hard-erase the bad firmware from the camera. It's a bit complicated, but my camera works again, like new. The process is called "de-bricking". Here's the link: https://www.tapatalk.com/groups/goprouse...-to-reflash-firmware-onto-a-bricked-hero4-camer-t23149.html I hope it's not too late and that you didn't already throw away your camera! And, a piece of advice, don't buy Gopro products anymore.. :) There are alternatives!