My GoPro Session 4 is unresponsive. It won't show any signs of charging. Although I did turn off LED and beeps. I thought that it would still show battery life after 4 hours of charging!
I did some more research and i just held the top button down for a while with SD out and without charger in.
also do that back mode first ten seconds, then introduce the shutter in it etc, all options gets it on.
what happens when usb to pc or laptop does the usb icon or camera come on?