Device shut down by itself

[Sendy]

Hi anyone can help me? I'm new in using sony experia c4 and somehow today the device just went black screen all of the sudden. What i should do? I merely using it in a week.

[_alexdon_]

See if you can force it to turn off:

http://support.sonymobile.com/global-en/xperiac4dual/userguide/Resetting-your-device/