Black screen is a common problem with LED displays . There are many reasons for a black screen, which can be caused by a short circuit in the control card, power supply, module, cable, or circuit. The main reasons for black screen are summarized as follows, and Eucolor Exclusive Display hopes to help you solve the black screen problem.
1. Please make sure that all hardware, including the control system, is properly powered on, note: 5V do not connect backwards or wrong connection
2. Check and confirm whether the serial port cable used to connect the controller is loose or falling off, and the color display suggests that if the screen is black during the loading process, it may be caused by this reason, that is, the communication line is interrupted due to loosening during the communication process, resulting in a black screen screen. Don’t think that if you don’t move the display body, the wiring can’t come loose. Please check for yourself, it 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 and inserted in reverse.
4. Please check and confirm whether the 50-core flat cable connecting the Lingxin control card and the hub distribution board is loose or plugged in.
5. If your display interface definition does not match the provided hub board, a black screen will also appear. Recheck your jumper for loose, open, or short circuits. If you think that you have matched the ABCD and other signals one by one, check whether the OE signals are connected correctly, LED display manufacturers strongly recommend using a hub switchboard that matches the display interface definition.
