最近收到同行送来的故障机壹台三星UA55JU7920JXXZ液晶电视，故障表现为开机红灯闪几下一直常亮黑屏，拆机，首先检查电源板开关变压器，发现是次级线圈焊点脱焊，重新补焊后开机一切正常，故障修复。    |
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