O primeiro tipo de situação: a tela de emenda do LCD não está ligada e esta situação ocorre. Ao se deparar com esse tipo de situação, a primeira verificação é o indicador da tela de emenda do LCD. Se o indicador estiver verde, a tela de emenda do LCD está funcionando normalmente e, se estiver vermelha, a luz precisa verificar se a linha de alimentação está conectada corretamente.
Second situation: The LCD splicing unit has a black screen, but the fan on the back of the screen still rotates. When this kind of phenomenon occurs, it is necessary to check the high-voltage line between the power supply of the splicing box and the screen. Only to ensure that each high-voltage line is in order and not misaligned, and there are no bent needles or fewer needles at the connection between the two ends can ensure the normality of the LCD splicing screen. Light up.
Three types of situations: the voltage is not enough, but when this kind of phenomenon occurs, check whether the short-circuit cap at JP1 or JP2 on the splicing screen board card is set on the 12V, and the wiring from the power supply to the 24V output is correct.
Four types of situations: If you cannot find out the reason for the black screen according to the above methods, you have to consider whether there is a short circuit in the internal circuit of the screen. Relatively speaking, the problem is more serious when such a situation occurs. As we all know, the splicing box used in the LCD splicing screen needs to go through repeated tests from the side panel to the finished product shipment. The short-circuit when the power is turned on without inspection may burn out the ultra-narrow LCD splicing screen or the splicing box. It is best to check carefully when installing, and 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 cause two situations: one is to change the splicing box, and the other is that the screen is directly scrapped. Only by changing the screen can the normal use of the LCD splicing wall be ensured.
