My Sony xperia z3 doesn't turn on

[Masterpogi]

I bought my xperia about a year ago and one time i was watching and it suddenly shut down and cant restart. Then the next day i tried to restart and it wont. It turs on the turns off immidiately. 

What do i have to do

[Qatrium]

@Masterpogi

Leave it on a wall charger for 2-3 hours then try to start it again. Does the LED notification light flash red when you charge?

[Masterpogi]

The flash light is red and it continually on and off.

What do i have to do??

[Qatrium]

@Masterpogi

Open the SIM card flap and find a small yellow button, use a non-sharp tool like a pen tip to press it. This will force your phone to turn off if it's stuck.

[Masterpogi]

It is restarting while charging

[Masterpogi]

It keeps restarting while charging 

[Qatrium]

@Masterpogi

Try using a different USB cable and/or wall charger.

[Masterpogi]

I tried that one already

[Qatrium]

@Masterpogi

Now I'm doubting a hardware issue with your power button. If you can check it and make sure it's not stuck. I think it's time to contact your Local support and ask for inspection at an authorized service center.

[Masterpogi]

Where can i find one