We use LED display alerts, occasionally encountered LED display black screen phenomenon, sometimes the screen is in use is normal, suddenly black, black sometimes appears in the sending program content, sometimes just turned on the electricity instantly black black state occurs, but in the process control system uses the same kind of phenomenon may be caused by a variety of reasons, even the LED display black also due to different operating or different environments. Encountered this phenomenon please do not worry, we can refer to the following aspects to determine the “fault” and the exclusion.
Make sure to have all the right power control system, including all hardware. Also, note that the positive and negative terminals of the power supply if there is reversed, then the wrong stage lighting usa. (+5 V is positive, GND is the negative.);
2 If you are using a wired control card, check and repeatedly confirmed the serial cable is used to connect the controller loose or peeling. (If the release of information on the way black is likely to be caused because of this reason, in the communication process is interrupted communication lines loose,
Hence the screen black. Do not think the display body did not move, it is impossible to loose line, hands-check, which is very important that you want to solve the problem quickly. );
If you are using Ling Guan GPRS wireless control card, on his way to publish information black, need to re-query whether the control card online, online re-released program information after the success of the screen to light (due to GPRS control card performed Ads
The stage lighting usa action is off-screen to open the screen action, if you publish unsuccessful, then it send instant off-screen, you can not start the opening screen action, which led LED display black screen);
4 If you are using Ling Guan wireless the GPRS control card, LED display found in the use sudden black screen is not lit, the operating software to query the clock, and then proofread the clock, LED display to light up work;
5 If you are using LED control card is the motherboard HUB board, please check and confirm whether the LED stage lighting usa display and connected to the main control card HUB distribution board tight junctions, is inserted backwards. Please check and confirm connecting Ling consistent control cable between the card and HUB distribution board Loose or inserted upside phenomenon.