故障表现为:VGA无图(花屏) 维修与分析:故障VGA无信号HDMI试机正常,说明只有VGA有故障,而先软件后硬件原则,更换软件后故障依旧。而后试着代换U12后故障还是依旧,再对VGA输入行场信号进行检查。发现R49/100欧电阻无穷大。 |
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