电视修半个月修出线条是什么原因？[attachment=12880375]

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就背光不行，5月15日修到5月31日送回

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中午差不多12点送到，艹赶上班没认真看，晚上10点多下班打开电视认真看才发现有2条直线，修前也问过其他人说换个背光很简单的，唉