Hi @Eve02, let me see if I can be of any help here.
I have translated your question to English as this is an International forum, please post any replies in English and it will be easier for me and other users to assist you.
Does the phone react at all when you connect it to a charger, for example, does the LED light turn red? Also, have you tried forcing a restart of the phone by pressing and holding the power-key and volume up-key simultaneously?
Firstly I suggest that you try to charge the phone for at least 30 minutes. If the battery is drained, it may take up to 30 minutes for your device to respond to the charging. During this time, the screen may remain completely dark, not showing the charging icon. Also note that it can take up to 4 hours for a completely drained battery to charge fully.
Another thing to keep in mind is to make sure that you are using an original Sony charger and USB cable specifically intended for charging your device. Other chargers may be too weak or too strong as they may have a different electric current rating (mA). It is recommended that you use a charger that is plugged into a wall socket instead of using a computer (and USB cable) to charge your device
You should also sure that the charger port is free from lint, dust and moisture. A blocked port can prevent the USB connector from fitting properly, and therefore prevent charging. Ensure that the USB port is completely dry, and gently remove any lint or dust
If none of these measures manages to switch your phone on again, I suggest that you I suggest that you get in contact with your local support team. They can help you to have your phone sent to an authorized service center to be physically examined. If you have any questions regarding the service, such as routines, warranty and consumer laws, these type of questions are best answered by your local support team as well, as they vary between markets.
Let me know how it goes!
