The screen of the laptop does not light up after it is turned on.

Possible reasons: true black screen, false black screen.

Judgment method: Look carefully, if you can still see the words on the screen, it is a pseudo-black screen. Otherwise, it is really a black screen.

Solution:

One: The fake black screen indicates that the lamp tube is broken and needs to be replaced.

Two: the real black screen is that the graphics card or the south bridge is broken. You can try an external monitor. If not, it's the graphics card. If the monitor is normal, 20% is the screen itself or the screen line, and 80% is the graphics card.

Extension: Precautions.

One: Pay more attention to the maintenance of computers at ordinary times. Use adaptive power supply. Using the power supply of other computers can make the notebook work, but the voltage is not suitable, which is easy to cause excessive current and damage the circuit.

Two: Thunderstorm weather needs to turn off the computer. Electronic products are easy to be damaged when working in lightning weather, and should not be used when thundering. After a long time, there will be computer failure. Even the standby state is not desirable.