Xperia M4 Screen issue.

[Mp23]

Hello my m4 Sony black screen but we hear the volume

Bonjour mon m4 Sony écran noir mais on  entend le volume

[Uliwooly]

@Mp23

I've edited your post as this is an English only forum, you can use Google Translate to reply and/or post. 

That seems to be a hardware issue, you should contact your Local support to get it inspected.