[Q] Xperia Go doesn't turn on.

Hello i have a question , I have xperia go st27i when i press power button nothing happend. Power volume up nothing ,power volume down nothing, volume up+down+power nothing, also tried holding volume down and plug cable for flash nothing. Phone is charging when i plug the charger battery symbol is showing that is charging and green light indicator. So when i plug charger first is showing Sony logo and then return to charging symbol and after that display is off i cant wake up with any buttons, perhaps so i thing it was problem with Power button or hardware problem. ? any idea or solution would be appreciated

Thanks you.

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