For ordinary notebook computers, press FN + F2 at the same time, or press FN + F9 / F11. However, it should be noted that the black screen keys of different brands are slightly different. If the black screen is caused by a problem with the computer, check whether there is a problem with the signal line or the hardware, and then solve it. What key can make the computer black? For ordinary notebook computers, when you press FN + F2 at the same time, the screen will be black. Repeat this operation again to turn it on. However, due to many computer models, it is not applicable. Some brands will also have this effect by pressing FN + F9 or F11.
Or sometimes we don't have a black screen after pressing the key, but a problem with the computer will suddenly black the screen in the process of use. First, we should check whether the signal line is loose or in bad contact, which will cause the display to receive the signal unsteadily, resulting in a black screen.
It may also be the internal graphics card driver failure. We can update the graphics card driver for testing. If the black screen phenomenon still exists, we should directly replace the graphics card. In this way, the problem of computer black screen can be basically solved. There are many black screen phenomena caused by other hardware problems. We can go to a professional maintenance shop for inspection.