[Completed] C6903/ Xperia Z1 don't start. - XDA Assist

Hi everyone,
It's been a day I'm looking for a solution for my problem. At home I made a charger, with li-ion batteries. When I plugged it in my phone (after boosting up the voltage to 5V), it immediately turned off and since then the phone does nothing.
When I want to charge it, the red led is on and every second it goes off for a fraction of time. With those things, I first thought I bricked my phone (It was rooted but original software and locked bootloader), so I followed the methods of this thread (http://forum.xda-developers.com/showthread.php?t=2646405) but my phone is not recognized. There's no reaction from the computer after I plug the phone to my computer with the test point to ground.
I'm hoping someone can help me with this problem.
Greatings,

Hello and thank you for using XDA Assist,
sorry for the delayed answer!
Please create a thread in one of our Questions and Answers sections:
Xperia Z1 Q&A, Help & Troubleshooting
Kind regards and good luck
Trafalgar Square
XDA Assist

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Hi,
I can't find anything helpful unfortunately and As there's no section for your device on XDA, this would be where to ask for help...
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Good luck!
Thread closed. Thank you.

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Hello and thank you using XDA Assist,
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please post your question in our Android Q&A section:
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Hello and thank you for using XDA Assist,
please ask in our Android Q&A section:
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The experts there should be able to help you.
Kind regards & good luck
Trafalgar Square
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