1, first adjust the lower end of the monitor or the button next to the monitor to see if you can adjust the brightness of the monitor.
2, desktop - "My Computer Properties -" Hardware - "Device Manager, to see if the graphics card driver is installed properly.
3, it is recommended to download the latest graphics card driver and install it, go to the driver home to download it and restart your computer.
4, if the above methods have not solved the problem, then we have to open the chassis, check the graphics card is not a problem, look at the graphics card on the module, the circuit whether there is a black, burnt traces.
5, if there is no problem with 4, you can unplug the graphics card and plug it in again, or change the socket, try to see if the problem can be solved.
6, if the video card has burnt traces, then you can only go to buy a new video card.