Try these keyboard shortcuts first:
- Windows logo key + Ctrl + Shift + B to reset the graphics driver. This can help if the screen has gone very dim or appears black.
- Windows logo key + P to cycle display/project modes in case the display mode changed.
- Ctrl + Alt + Del to bring up the security screen, which can help wake the display.
If the screen becomes viewable again, check these settings to stop it happening repeatedly:
- Go to Start > Settings > System > Display.
- Open Brightness.
- Set Change brightness based on content to Off.
- If available, look for Change brightness automatically when lighting changes and turn it off.
On Surface devices, adaptive brightness and contrast can change brightness based on what is on screen. Turning Change brightness based on content to Off disables that behavior. Connecting the Surface to power can also temporarily disable this feature.