What if the alarm clock of Samsung mobile phone doesn't ring?

Samsung NOTE3 mobile phone alarm clock can't be used, suggestion: 1. Click the alarm clock-check whether the green light on the right side of the time is on. 2. Check the third-party software recently downloaded by the mobile phone. It may be that the software is incompatible with the mobile phone, so I suggest you uninstall it. 3. Back up mobile phone data (phone book, SMS, multimedia files, etc.). ) and restore the factory settings (Settings-Reset-Restore Factory Settings). If the problem still exists, I suggest you.