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联想N40-70笔记本触发掉电小修一列 板号LA-B091P rev:1.0

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Post time: 2019-9-7 12:52:25
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接修同行一台联想N40-70笔记电脑一台。 接上可调电源待机正常,开机能触发但是电流突然跑到1.3A然后电脑就自动关机了,初步诊断有短路。再次触发还是一样。那就拆机,主板拆出来检查全板有无损伤。发现图卡器卡槽背后有一个地方进水腐蚀了,清理干净,结合初步判断为短路,怀疑是电容引起的,这个地方是一个读卡器芯片,一测果然如此,开电烙铁,拆之。再简单测下各大电感没什么问题。接上屏接电开机电流0.5几就亮机了。原厂BIOS亮机真的是很快。第一次发帖写的不好大家将就看看

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Post time: 2019-9-10 10:21:29
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谢谢楼主的有图有真相经验分享
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