So my HTC One M8 just completely died on itself yesterday, from about 90% battery. It felt quite hot (although not the hottest I've felt; some games used to push it a lot hotter), and no matter how hard I try, it just wouldn't turn on.
I've tried almost everything mentioned in this thread, to no avail. I've tried pressing the power and volume up buttons together for more than two minutes, plugged and unplugged, under direct sunlight, and still got no response.
The only sign of life is that, when plugged in to a PC / wall outlet, the orange LED does come on. However, no matter how long I charge it (I've left it plugged to a wall outlet overnight), it never goes green.
Any suggestions before I start contacting HTC support?