1. Try to charge the phone with the line for a while, or replace it with a battery of the same model.

2. Take out the SIM card and SD card at the same time, and then try to turn it on.

3. When you see the "SAMSUNG" logo icon, please press and hold the menu key (left touch sensitive key) until the words "Safe Mode" appear in the lower left corner of the screen, and then release it to back up data (such as contacts, SMS, photos, etc.). ) and restore the factory settings.

4. If you can't enter the safe mode or the problem still exists after operation, it is recommended to take the three-guarantee certificate of the mobile phone to the nearest Samsung service center for inspection and maintenance.