Talking about the Causes and Solutions of the Black Screen of LED Display

It is understood that led display 80% of the fault is the following factors: AC distribution wiring harness, terminals, connectors, signal and low voltage DC connection harness and connector, switching power supply module, fan, plastic shell components. If these interfaces, cables, power supply, and bottom case are not selected, it will cause the entire or partial black display of the led display screen, Huaping, mosaic, and no signal.

80% of the remaining faults are due to the following reasons: Solder joints on the PCB, capacitors, terminals, LED lights, dust accumulation due to insufficient protection of the cabinet, leaking of the hardware hardware of the drain screw, and control board. These reasons may cause the led display to have a deuterium light or highlight, one or more lines are not lit, lack of color, etc. If the control card or software has a problem, the image display may be abnormal.

In the process of using the control system, occasionally there will be a black screen led display. The same phenomenon may be caused by a variety of reasons, and even the darkening of the display screen may be different for different operations or different environments. For example, it may be black at the moment of power-on, or it may turn black during loading, or it may turn black after sending.

How should we solve it?

1. Make sure that all hardware, including the control system, is properly powered on.

2. Check and re-check whether the serial cable used to connect the controller is loose or missing. (If it becomes dark during loading, it may be caused by this reason, that is, it is interrupted during the communication process due to the loose communication line, so the screen is black. Do not think that the display screen is not moving, the line cannot be loosened, please Check it out, this is very important for you to solve the problem quickly.)

3. Check and confirm whether the LED display and the HUB distribution board connected to the main control card are tightly connected or not.

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

5. If the definition of your display interface does not match the provided HUB board, a black screen may also appear. Please check your jumpers for looseness, open circuit or short circuit. If you think that the signals such as ABCD have been matched one by one, please check whether the OE signal is connected correctly.