After the screen of Samsung s8 mobile phone is locked, there is a notice. Why is there only sound on the screen? How to set messages with sound and screen reminders?

If the mobile phone displays a black screen, there are many reasons, such as system problems and software conflicts. The damaged screen will be displayed as a black screen. It is recommended to try the following:

1. If the screen is always black:

Press and hold the power button for more than 10 second, and then try to turn the machine on and off again. If the fault still exists, it is recommended to send the mobile phone to the nearest service center for testing.

2. If the screen is black sometimes:

1. It is recommended to uninstall the third-party plug-ins running before the black screen.

2. Back up mobile phone data (phone book, SMS, multimedia files, etc.). ) and restore the factory settings.

If the problem still exists, please bring the purchase invoice, maintenance card and machine to the service center, and the engineer will check the machine and deal with it.