My Xperia M2, out of nowhere, started to do this. The Xperia screen that pops up when you turn the device opn appears, then it shuts itself down; Repeat.
I tried waiting for the battery to run out. The phone slightly overheated, then I charged it again and the moment it had a little charge, it started doing this again. The On/Off button isn't stuck or anything alike.
What do I do?