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AM3358 主芯片在测试过程中，发现PMU发热，后检查发现A8主芯片中的VDDSHV6一组引脚对短路，把外围电路去掉还是短路，确定是此路供电部分烧坏。问题测试老化中没有触碰其主板，为什么此路电源会烧毁？会是什么引起的？困惑啊
