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J721EXSOMXEVM: PMIC无输出

RAIN HU
Prodigy 130 points
Part Number: J721EXSOMXEVM

PMU输入电压可以测到3.3V，表示输入正常。输出的五个BUCK和四个LDO均为0V，表示PMU无输出，请问这种情况发生的原因可能是什么？