How to fix the black screen issue of variable message sign

In the process of using the control system, we occasionally encounter the phenomenon of a black screen in variable message sign. The same phenomenon can be caused by a variety of different reasons, and even the process by which VMS Traffic Signs go black can vary from operation to operation or from environment to environment. For example, it may be black the moment it is powered on, it may turn black during loading, it may turn black after it is sent, and so on. So what should we do when the LED display screen goes black? The following editor will introduce to you how to operate.

1. Please make sure that all hardware, including the control system, has been powered on correctly.

2. Check and repeatedly confirm whether the serial port cable used to connect to the controller is loose or falling off. If it turns black during the loading process, it is likely to be caused by this reason, that is, the communication process is interrupted due to a loose communication cable, so the screen is black. Don't think that if the LED display screen body is not moving, the line will not be loose, please check it with your hands, it is important for you to solve the problem quickly.

3. Check and confirm whether the LED display screen and the HUB distribution board connected to the main control card are tightly connected and reversed.

4. Please check and confirm whether the 50-core cable between the connection control card and the HUB distribution board is loose or reversed.

5. If your LED display interface definition does not match the provided HUB board, there will also be a black screen, please re-check whether your jumper is loose, open or short-circuited. If you think that you have already mapped the ABCD and other signals one by one, it is also important to check whether the OE signal is connected correctly, which is also important to solve the problem.

Grasp the above methods to solve the problem of black screen of Dynamic Message Sign perfectly.