在贸泽采购了210个 LMV321AIDBVR，在板子上面不工作，出现异常不亮灯的情况，重新更换了芯片，然后就正常工作了，请问这是什么情况呢？附件有视频可提供参考，谢谢！
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LMV321AIDBVR 在板子上面不工作
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