Now, LED large screen wide application in our daily lives, more and more common, but in our daily use LED display process, you may encounter a variety of LED screen appears different symptoms, do not understand the LED display screen operation might be asking this question people below you do to address these aspects explain:
 
       A, LED screen black screen appears what is the reason?
 
In the process control system application, we occasionally encounter LED screen appear black screen phenomenon. The same phenomenon may be caused by a variety of causes, and even black screen will vary depending on operating procedures or because of different environments and different. For example, it may be a momentary power on is black, also may darken during loading, and may be sent in after dark, and so on:
 
1. Make sure that all control system, including hardware have all the right power. (+ 5V, do not reverse, wrong)
 
2. Check and repeatedly confirmed serial cable for connecting the controller are loose or fall off phenomenon. (If the black in the loading process, it may be because the reasons that in the communication process was interrupted due to a communication line loose, the screen goes black and therefore, do not think the screen body did not move, the line can not be loose, Please check the hands, which wants to quickly resolve the issue is important.)
 
3. Check to make sure the connection LED screen and HUB distribution board and the main control card is connected to the tight junctions, is inserted backwards.
 
       Second, the reason for a few seconds, the screen bright line or change the appearance of flower power led just on the big screen?
 
After the screen controller and the computer and HUB distribution panels and screens connected properly, you need to provide the + 5V supply to the controller in order to make it work (in this case, not directly connected to the 220V voltage). Power moment, will appear on the screen for a few seconds-line or "Huaping" the bright line or "Huaping" tests are normal phenomenon, remind the user of the screen will begin to work. Within 2 seconds, automatically eliminate this phenomenon, the screen enters normal working condition.
 
       The entire film screen is not bright, dark, bright three reasons, cell plate appears
 
1, 26P cable and power module indicator Visual power cable, cell plate is normal.
 
2. Use a multimeter to measure whether the normal cell plate voltage, then measure the power module output voltage is normal, if not, it is determined that the power supply module bad.
 
3, measuring power module voltage is low, adjust the trim (trim indicator near the Power Module at) the voltage up to standard.
 
       Fourth, the load is not on or what the reason is not on the communication?
 
       Communication does not load on and on substantially the same reasons, it may be due to several reasons, please be controlled according to the lists of actions:
 
1, ensure that the control system hardware has the right power.
 
2. Check to make sure the serial cable for connecting the controller to direct line, instead of a crossover cable.
 
3. Check to make sure that the serial cable intact and no loose ends or shedding phenomenon.
 
4, control led large-screen control software and they choose to use the control cards to select the correct product model, correct transmission, the correct serial number, the correct serial transmission rate and control within the software set up correctly to provide the DIP switch Figure address bits and serial transmission rate control system on hardware.
 
5. Check the jumper cap is loose or fall off; if no jumper cap loosening, make sure the jumper in the right direction.
 
6. After adjusting for the above checks and still not appear loaded on, use a multimeter to measure, hardware serial computer control system is connected or is damaged, return the computer to confirm whether the manufacturer or the control system hardware body return detection.