1. First, check the power supply to make sure the power cord is securely connected to both the laptop and power outlet.

2. Second, verify if the laptop's display is set to an external monitor.

3. Third, restart your laptop to activate any updated system settings.

4. Fourth, check the laptop's power settings, and set the display to turn on after a certain period of time.

5. Fifth, if the laptop has a dedicated graphics card, ensure it is properly connected.

6. Sixth, try connecting an external monitor to the laptop to check if the display issue is confined to the laptop's display.