长虹LT4288液晶电视，开机没图象有声音，测量U810的24V输出脚，测量电压24V升起后瞬间降为1V，断开逆变器测量也是如此，无高压，背光灯管不亮，请高手指点！[另请说明下U810个各脚功能是什么？]集成块带号是 JM69RG LM2596S手机版|家电维修技术论坛 ( 鄂ICP备09003585号-2 )
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长虹液晶电源输出电压及代换.pdf
