Sony Xperia E1 D2005, press power button and it vibrates 3 times but won't turn on

[FUNKIMUNKI-17]

I've got the xperia e1, when I press the power button all it does is vibrate 3 times but the screen stay black. But there's a white flashing notification light showing but I don't know what it is about as I can't see anything due to the screen been black. 

I don't know why this is and I don't know what to do?