Z1 won't turn back on.

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I've really been enjoying using my Xperia Z1 so far, I'd not had a smart phone before this and I've not been massively impressed with most of the ones that I'd tried until this one.

However, last night I noticed my battery was down to 8% so I plugged it into my PC to charge it. After a while I checked to see how charged it was, and it had only gotten to 35%ish so I thought I'd turn the phone off so that it wasn't draining the battery as it charged. I held the power button down until it gave me the shutdown menu and told the phone to turn off.

When I went back to my phone a few hours later I unplugged the charger from the phone and tried to turn it on (held the power button down), but nothing happened.

I've tried pressing the small red button next to the sim card.

I've tried holding the power button down with each of the volume buttons?

Any idea?

Please help.

Thanks!

I didn't find the right solution from the Internet.

References talk.sonymobile.com/t5/Xperia-Z1-Z1s/Z1-won-t-turn-back-on/td-p/390335

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