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                昭阳E47A型笔记本电脑开机不显示故障
                来源:家电维修  作者:佚名  2018-10-15 10:46:43

                    一台昭阳E47A型笔记本电脑,开机后各种指示灯正常点亮,但屏上没有任何显示。
                    查资↑料得知,该机型显卡易出问题(此机型集成显卡被屏蔽,只有AMD Radeon HD6370M独显工作)。拆机取出主板(板号为DAOKL9MB6F1),测CMOS电池电压正常。仔细观察主板,发现显卡背∑ 面PCB板过孔◤有很明显的虚焊现象(估计是使用时间过长造成的虚焊),如图1所示。将热风枪调到400℃左右,在这些过孔上涂上☉焊宝,然后用热风枪对其加热,待焊宝沸腾时停止△加热,冷却后清洗干ㄨ净PCB板,装机试验,故障排除。

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