| 故障表现为：灰屏 检修及分析：通电开机有声音背光亮灰屏，拆开机器检测CN06处屏供电12V正常，打开逻辑板屏蔽罩发现保险F1烧断，用表测量无明显的短路，重新更换保险丝通电试机再次烧断…于是将屏排线的J3/J4/J5/J6全全断开再次更换保险通电不再损坏，关机再重新接上J3-J6的屏排线测量发现J4的P46-49脚对地短路表明屏内部电路异常，于是将屏拆开对照J4的P46-49脚线序找到C1（耐压25V的贴片电容）表侧短路，更换后通电试机一切正常。 |
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