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Power OK LED on T4-1

in SPARC Legacy servers (MOSC) Question
Hi experts,

Would you tell me about Power OK LED on T4-x server ? I refer to T4-1 service manual page 21, ie. E22990.

I understand 1 and 2, but do not understand 3 and not sure about 4.

Question 1.

What's the condition fast blink may happen ? I do not know if T4-1 server has power saving mode as same as x86 machine.

Also, pls advice how the blink is fast, ie. xxx times of blinking in a second (xx hz) is very clear.

Question 2.

I believe this may happen when POST is in progress or OS boot is in progress. Is it correct ?

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