Won't turn on. Stuck in a reboot loop.

Hi. I've had this phone for over a year and this hasn't happened to me yet. So one day I plug my e980 to charge and on the next morning I go to unplug it and noticed that it work turn on (it was shut off). Whenever I would try to turn it on I just get the LG logo screen with the flashing keypad and then it suddenly turns off and repeats itself. Please help.