a. Please make sure that all hardware including the control system is powered on correctly. (+5V, do not connect reversely or wrongly)
Indoor LED rental screen for corporate party
b. Check and confirm again and again whether the serial cable used to connect the controller is loose or falling off. (If it turns black during the loading process, it is probably because of this reason, that is, the communication line is interrupted due to loose communication, so the screen goes black. Do not think that the line cannot be loose if the display body does not move Check it out by hand, it's important if you want a quick fix.)
c. Check and confirm whether the LED display screen and the HUB distribution board connected with the main control card are tightly connected and whether they are plugged in or not.