I have a Galaxy S6 Active. I just fell and landed on my but with my phone in my back pocket. Now my screen won't turn on. The blue light in the upper left corner is solid but slowly pulsing. I tried a soft reset(Pwr+vol down) and heard a brief AT&T start up sound. The screen flickered for about 1/2 second. Then blackness. The phone had been working perfectly up to then. I've tried pushing every button and nothing. Any suggestions would be greatly appreciated.