Problems started yesterday. First it refused to connect to computer via USB, then it didn't load battery using it's own charger and then I switched it off. The front leds didn't turn off so I removed battery. Then I put it back in and tried to reboot. No any sign of life and seems bricked to me. Battery still had about 30% power left when I turned it off. Strange here is that I haven't rooted it, so why it does this and how to fix it?