The LED display screen has four parts: computer control part, display drive matrix, led display array, and power supply. Among them, there are more problems:

　　 1. Interface problems. Phenomenon: The computer information cannot be displayed, check the cable

　　 2. Power supply problem. The LED display uses a low-voltage high-current power supply, which is not much different from an ordinary DC power supply

　　 3. Drive problems. There is no display in each row or column, that is the corresponding drive circuit (chip) problem, just replace it

　　 4. Display problems. Long-term use of the LED display screen may be damaged and aging, just repair and replace it.

　　 LED display common fault handling process-diagnosis process:

　　 1. Determine whether your display is a synchronous display or an asynchronous display; the display of the synchronous display depends on the setting of the display, and the asynchronous display does not depend on the setting of the display;

　　2, determine whether your display is a partial display problem or the entire screen has a problem;

　　Partial display abnormality can eliminate communication problems. Generally, it can be determined that the display hardware is malfunctioning. You should contact us immediately to prevent the malfunction from expanding;

　　 There are many possible reasons for the abnormal display of the whole screen:

　　 For the synchronous display, you should confirm whether the display settings are changed, whether the communication is normal, whether the transmission is normal, and then whether the reception is normal;

　　 For asynchronous display screens, first confirm whether the parameters of the display screen: hardware address, width, height, IP are changed, if these parameters are correct, then test whether the communication is normal, and finally confirm whether the display control is normal or the interface of the display unit board.