In the past few years, LCD splicing screen technology has become more and more mature, and its application areas have also developed from monitoring rooms to shopping malls, schools, stations and airports. However, LCD splicing screens are electronic devices after all, and some uncommon situations will inevitably occur. For example: when using the LCD splicing screen, the screen suddenly turns black and does not light up, the screen is blue, etc. But how to solve this kind of screen does not light up? The following is the method of Shanghai Jili Information Technology Co., Ltd., summarized as follows:
One situation: The LCD splicing screen is not powered on, which causes this to happen. When encountering this situation, first check the indicator light of the LCD splicing screen. If the indicator light is a green light LCD splicing screen, it can work normally, if it is a red light, you need to check whether the power cord is properly connected.
The second case: the LCD splicing unit has a black screen, but the fan on the back of the screen will still rotate. When this happens, you need to check the high-voltage line between the power supply of the splicing box and the screen. Just make sure that each high-voltage line is in order and there is no misalignment. There are no bent needles at the joints at both ends, and fewer needles can ensure the normality of the LCD splicing screen. Light up.
Three situations: insufficient voltage, but when this phenomenon occurs, check whether the short-circuit cap on JP1 or JP2 on the splicing screen card is placed on 12V, and the wiring output from the power supply to 24V is correct.
Four situations: When you cannot find the reason for the black screen according to the above method, you must consider whether there is a short circuit in the internal circuit of the screen. Relatively speaking, the problem is more serious. As we all know, the splicing box used in the LCD splicing screen needs to be repeatedly tested after splicing from the side panel to the finished product. The short-circuited LCD splicing screen may burn out or the splicing box may burn out. It will burn out when the power is cut off without inspection. It is best to check carefully before installation. Use a multimeter to test whether the screen line and high-voltage line are normal before powering on, so as not to cause unnecessary trouble. Because the short circuit will only lead to two situations: one is to replace the splicing box, and the other is to directly scrap the screen and only change the screen to ensure the normal use of the LCD splicing wall.
