创维液晶电视37L05HR有指示灯不能开机维修过程
创维液晶电视37L05HR开机指示灯红色，马上变成蓝色，屏幕没有光，测量电源高压二合一板，5V、12V、24V全部都是正常，但是背光控制端没有电压，用镊子瞬间短路5V和背光控制端脚，发现可以点亮背光灯，所以判断电源高压板正常，故障在主板。鉴于主板零件密度太小，不好维修，和客户商量带走主板，能修则修，难修则换。客户同意了，于是把主板拿回店里慢慢修理。把主板接上5V、12V电压检查，发现一个三端稳压管AS1117L-18不正常，把它换掉，测量背光控制端有了5V电压，而且指示灯可以控制了，随着遥控器开关机变成红色和蓝色。维修成功。图片有点乱，不懂的整理，将就着看吧。
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