My phone is currently powered off. I can't turn it on, I even used the restart button next to sim tray. When I plug in the phone to the charger then the Sony logo appears and then it shows me my battery percentage. The phone can be charged but once I press the power botten to turn it on then I hear three vibration then everything blacks out and sony logo appears again it shows me the battery percentage. Same thing happens when I pressed the restat button near the sim tray. Please help me.