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液晶电视出现“三无”故障的原因是因为主开关电源未能输出+12V直流电压。检查时,先通电开机,通过观察红色指示灯是否发亮和发光强弱来判断主电源的工作状态。
LCD TV “three no ” failure is due to the main switch power fails to output + 12V DC voltage. Check, the first power-on, by observing the red indicator light and light intensity to determine the working status of the main power supply.