There's a procedure here to follow, which directs you through some self tests, then issues an RMA if you can't sort the problem. http://www.microchip.com/cisar/Home.aspx
这里有一个程序，它指导你通过一些自我测试，然后发出一个RMA，如果你不能排序问题。
以上来自于百度翻译
以下为原文
There's a procedure here to follow, which directs you through some self tests, then issues an RMA if you can't sort the problem. http://www.microchip.com/cisar/Home.aspx
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