Your notebook computer G-MAX N411's power management system automatically blanks the screen to save power. Press any key to turn the display back on. If pressing a key does not turn the display back on, two things might be the cause:

The brightness level might be too low. Press ＋ and ＋ to adjust the brightness level.

The display device might be set to an external monitor. Press the display toggle hot key ＋ to toggle the display back to your notebook computer G-MAX N411.