LCD液晶彩电整机无电压输出,说明主板电路发生了故障。应重点检查电源电路和驱动板,检修程序如下:1.电源电路检修程序检修时,可采用“观察法”和“排查法”。“观察法”就是观察熔丝管是否熔断,电容是否鼓包,PCB(印刷电路板)有无烧损变色的痕迹;“排查法”就是电路各元器件进行逐一检测。通过以上方法,一 LCD LCD TV without voltage output, indicating that the motherboard circuit failure. Should focus on checking the power circuit and the driver board, maintenance procedures are as follows: 1. Power circuit maintenance procedures overhaul, you can use “observation ” and “investigation method ”. “Observation method ” is to observe the fuse tube is blown, the capacitance is blister pack, PCB (printed circuit board) has no traces of burning discoloration; “investigation method ” is the detection of the circuit components one by one. Through the above method, one