Lockscreen turns black
Hi, I am using iphone 7+ and my lockscreen turns black and I try everything like update my phone, restart it and it doesn’t work.
iPhone 7 Plus
I think you have the "Bedtime" feature in Do Not Disturb turned on.
Bedtime: When Bedtime is enabled, the Lock screen will dim, calls will
be silenced, and notifications will appear under During Bedtime in the
Notification Center until your scheduled Do Not Disturb ends.
See here: Use Do Not Disturb on your iPhone, iPad, and iPod touch - Apple Support and Use Bedtime to track your sleep on your iPhone - Apple Support
-AJ