open but couldn't show

[Malaya_1]

My Lenovo laptop 8.1 will open but couldn't show in screen.screen will appear a dark light only .

 

[Saga Lout]

Look at the row of Function keys above the numbers on your keyboard. If you see one with a Sun icon and another with a Moon, press the Sun button and the Fn key to the left of your Spacebar at the same time. That operates the brightness control so try that first before assuming something is wrong.