After the monitor screen goes black, its indicator light stays on, indicating that there is no problem with the host, graphics card, and signal cable. The fault lies in the monitor itself, mainly:
1. High-voltage board failure, including There is a problem with its power supply circuit;
2. The backlight tube is faulty, or their pins are oxidized and corroded;
3. The AD driver board is faulty, or its power supply circuit is faulty ;
4. DC/DC conversion circuit failure;
Among the above items, if the screen display content can be seen under strong light (or when squinting), the fault belongs to the first , Article 2, otherwise it falls under Articles 3 and 4, please check by yourself.