If you are experiencing issues with your phone’s screen not turning on when you receive a notification, the following steps will help you to troubleshoot the problem:

1. Check if the power saving settings of your phone are activated
2. Check your phone’s connection to the data or WiFi network
3. Check the apps you used to set up the notifications are functioning correctly
4. Restart your phone and reset the settings to their defaults
5. Seek a professional repair or replacement if the issue persists