What should I pay attention to when using the LED display control card? Different brands of control cards and corresponding installation software are different. The same brand is also divided into different models, and the functions vary greatly. A small area of monochrome screen commonly used simple non-zoning control card, cost-effective; and a slightly larger area can use the partition control card, the price is higher. What are the LED display control card connections? Control card and computer connection methods are: network port (TCP / IP), serial port (RS232, RS485), U disk transmission, GPRS wireless connection, Zigbee wireless connection and other major methods. How to choose LED display control card? First understand the specifications and dimensions of the LED display, calculate the number of points, know the effect you need, whether it is synchronous or asynchronous, you need no secondary development; then, determine the synchronization asynchronous, determine the effect, determine the range of points, determine the price range, Finally determine the card; the most appropriate control card selection, not necessarily high price, good quality is the most suitable. Finally, the software is not suitable for yourself and customers. What if I can't find the LED display control card? 1. Confirm that the control card is compatible with the software. 2. Check if the cable is disconnected or loose. Check and confirm that the serial cable used to connect the control card is connected with the control card. Some control cards are controlled by straight-through (2-2, 3-3, 5-5). For cards (2-3, 3-2, 5-5). 3. Make sure that the control system hardware is properly powered. 4. Compare the control card software and the control card of your choice to select the correct product model, the correct transmission method, the correct serial port number, the correct baud rate and correctly set the control system hardware against the DIP switch diagram provided in the software. Address bit and baud rate on. 5. If it still fails to load after the above checks and corrections, 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 return the control system hardware. Detection. 6. If the fifth step is not convenient, please contact the factory for technical support.