2. Check and reconfirm whether the serial cable used to connect the controller is loose or falls off. (Suggestion from LED display manufacturers: If it turns black during the loading process, it is probably caused by this reason, that is, the screen is black because the communication line is interrupted during the communication process. Don’t think that the display body does not move, the line It is impossible to loosen, please check it yourself, it is very important if you want to solve the problem quickly.)
4. Please check and confirm whether the 50-core cable connected between the Lingxin control card and the HUB distribution board is loose or reversed.
5. If the interface definition of your display screen does not match the provided HUB board, a black screen will also appear. Please recheck your jumper for looseness, open circuit or short circuit. If you think that the ABCD and other signals have been matched one by one, please check whether the OE signal is connected correctly. (LED display manufacturers strongly recommend using a HUB distribution board that matches the interface definition of the display)