收到同行送来的故障机壹台创维42L16HR液晶电视（8TAG机芯）故障表现为红灯亮不开机，开盖测5V有，12V 24V无，开机电压0V，测主板5V 3.3V正常1.8V无，测U26输入电压1.2V 不正常，测D46正极电压5V D47正极电压4.2V 故障就在D47 换之1.8V有了，通电试机绿灯也亮了。 |
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