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判断BGA引脚有无虚焊的方法:
万用表打到二极管档(或者短路档), 红表笔接地, 黑表笔量CPU引脚对应引出线, 一般正常读数为 0.25V~0.8V, 无穷大(即读数为1)时为假焊, 为0时即是短路或击穿, 最准就是用块好板对比读数。
靠谱,我就是这么干的。
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