1. Check whether the graphics driver is installed. If the graphics card driver is not installed, you can contact the graphics card customer service to learn about the driver and installation method, or you can download and install it yourself from the graphics card brand official website.
2. Check whether the wiring of the computer is correct. The discrete graphics card should be connected to the output interface of the graphics card. I can't use the discrete graphics card on the motherboard.
3. Check whether the gold finger of the graphics card is oxidized to cause poor contact. At this time, the gold finger interface of the graphics card should be cleaned up.
4. Check whether the video card is connected to the power supply. Some high-power graphics cards need to be connected to the power supply.