1. Check whether the jumper cap is loose or falling off; if the jumper cap is not loose, please make sure that the direction of the jumper cap is correct.

2. Check and confirm that the serial cable used to connect to the controller is a straight-through cable, not a crossover cable.

3. Check and confirm that the serial port cable is intact and there is no looseness or fall off at both ends.

4. Compare the LED display control software and the control card you choose to select the correct product model, correct transmission method, correct serial port number, correct serial transmission rate, and set correctly according to the dial switch diagram provided in the software Control the address bits and serial transmission rate on the hardware of the system.

5. Make sure that the control system hardware has been powered on correctly.

6. If the loading fails after the above inspection and calibration, please use a multimeter to measure whether the serial port of the connected computer or control system hardware is damaged. To confirm whether it should be returned to the computer manufacturer or the control system hardware for testing.

Follow the above six methods. The failed loading of the LED display can be solved. If the problem still cannot be solved, please contact the manufacturer of the LED display and let them help you solve the problem. Does it feel very practical? Collect it now!