During routine inspections, Engineer B discovered that the power module indicator light of the OceanStor Dorado 6800 storage system that had just been used was green and flashing. What are the possible states of the power module at this time?

During routine inspections, Engineer B discovered that the power module indicator light of the OceanStor Dorado 6800 storage system that had just been used was green and flashing. What are the possible states of the power module at this time?
A . The power input is normal, but the device is not powered on.
B . No external power input
C . The power module is in the process of online upgrade
D . The power module fails

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Answer: D