There may be three reasons why the laptop screen does not display the picture: one is that the laptop graphics card driver is installed incorrectly, causing the laptop to be unable to drive the graphics card normally; one is that the laptop screen cable is damaged or even broken, resulting in no power supply to the monitor; the other is The laptop graphics card is aging or burned out and cannot work properly. The following is a detailed introduction:
1. Determine whether the laptop screen is really black or just has no backlight, but there is still a display on the screen. If it is Or it may be due to a problem with the backlight layer, and it can only be repaired by a professional repair shop;
2. If the screen is really black, then the graphics card or south bridge is broken; you can try the troubleshooting method, Use an external monitor to connect to the video port of the laptop. If the external monitor does not light up, it can be determined to be a problem with the graphics card;
3. Since most laptop graphics cards are irreplaceable, they can only be repaired at an after-sales point. Repair and replace the graphics card with a new one;
4. If the external monitor is normal, then it is a problem with the screen itself or the screen cable;