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All side buttons unresponsive and phone will not switch on but responds to charging
Hi @8889522,
I'm sorry to hear this. As @uliwooly asked, has the phone been exposed to water or any other external damage?
I would recommend that you try and force shutdown your device using the dedicated off button located under the SIM-cover. You can see where it is located in the picture bellow.
After that try and start your device as normal. If you are unable to I recommend that you try and perform a software repair using Xperia Companion.
Let me know how it goes!