I got the HTC One on AT&T a while ago and a coule weeks ago, rooted it and installed a custom ROM. It worked fine for the whole time, but suddenly, it turned off while it was on around 80% battery. I tried turning it on, but nothing happened. I tried charging it, but the LED light didn't even come on. I looked around and a lot of people said to hold the power and volume up buttons at the same time for 10 seconds, but that didn't work. I also read that I should try turning it on under a bright light, but that didn't work either. Any ideas? Thanks