How to deal with the black screen fault of LED display screen

　　1. Please ensure that all hardware, including the control system, has been properly powered on. Note:+5V, do not connect reversely or wrongly.

　　2. Check and confirm whether the serial port cable used to connect the controller is loose or falling off. If the screen turns black during the loading process, it may be caused by this reason, that is, the communication line is loose and interrupted during the communication process, so the screen turns black. Do not think that the line cannot be loosened without moving the display screen. Please check it by hand, which is very 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 inserted reversely.

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

　　5. If your LED display interface definition does not match the HUB board provided, black screen will also appear. Please recheck your jumper for looseness, open circuit or short circuit. If you think you have mapped signals such as ABCD one by one, please check whether the OE signal is connected correctly. Warm prompt: LED display manufacturer strongly recommends to use HUB distribution board matching the display interface definition.

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