①、向这故障主要应检查一下,背光亮控制电路元件<br> 如图。<br><img src="https://iknow-pic.cdn.bcebos.com/aa18972bd40735fa55ce5de997510fb30f2408a7?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1" max-height="200">