Nowadays, led large screens are widely used in our daily life, and more and more common, but in our daily use of LED display screen , you may encounter various fault phenomena appearing on the big screen of led , do not understand The person who operates the LED display screen may be troubled by this. I will give you some introductions in these aspects:
First, what is the reason for the black screen on the LED screen ?
In the process of using the control system, we occasionally encounter the phenomenon that the screen of the LED screen appears completely black. The same phenomenon can be caused by a variety of different reasons, and even the process of darkening the screen can vary from operation to operation or from environment to environment.
1. Please ensure that all hardware including the control system is properly powered.
2. Check and confirm if the serial cable used to connect to the controller is loose or loose. ( If it gets dark during the loading process, it is probably because of this reason )
3. Check and confirm whether the connection LED screen and the HUB distribution board of the main control card are connected or not.
Second, the LED screen is just a few seconds after the power-on screen, the screen line or the screen picture changes ?
After connecting the screen controller to the computer and the HUB distribution board and screen, you need to provide +5V power to the controller for it to work properly. At the moment of power-on, there will be a few seconds of bright lines or “ flower screen †on the screen . This bright line or “ flower screen †is a normal test phenomenon, reminding the user that the screen is about to start normal work. Within 2 seconds, the phenomenon is automatically eliminated and the screen enters normal working condition.
Third, the unit board appears the whole screen is not bright, dark reasons
1. Visually check whether the power cable, the 26P cable between the unit boards, and the power module indicator are normal.
2. Use a multimeter to measure the normal voltage of the unit board, and then measure whether the voltage output of the power module is normal. If not, it is judged that the power module is bad.
3. The voltage of the measuring power module is low, and the fine adjustment is adjusted, that is, the fine adjustment of the power module near the indicator light makes the voltage reach the standard.
4. What is the reason for not loading or not communicating ?
Communication is not the same as the reason for loading, it may be due to the following reasons
1. Ensure that the control system hardware is properly powered.
2. Check 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 are no loose or falling ends.
4 , according to the led large screen control software and the control card of your choice to choose the correct product model, the correct transmission method, the correct serial port number, the correct serial transmission rate and set correctly.
5. Check if the jumper cap is loose or off ; if the jumper cap is not loose, please make sure that the jumper cap is in the correct direction.
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