Phone switches off automatically while playing online game and does'nt

My Sony Xperia ZR device was just working fine and when i used to play online game my device shuts down automatically and won't turn on and when I connect it to charging the red led blinks and Sony logo shows up and nothing more it keeps repeating and my pc also wont recognize,tried resetting my device also but the same problem persists and no help from service support !!! I need a fix for this problem