Dear Samsung Member,
Greetings from Samsung Customer Support!
Please perform the below mentioned steps to resolve the issue:
* Adjust the brightness: Settings > Display > Adjust the brightness.
* Check device in safe mode: Press and hold the Power key, when Power off icon appears > Press and hold the power off icon. To exit safe mode: Restart your device.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
Thank you for writing to Samsung.
Samsung Customer Support