X4200 M2 main system power goes out even with UPS

Hi,
I was curious of which direction I should go to find out why when we get a brown out/black out the main system goes down immediately but the power lights blink and it appears to be on to some degree. I thought the UPS wasn't sufficient to sustain it but am wondering if there is something else causing the system to go down since the front panel lights blink. The 2 lights blink yellow and I believe they are the power light and the light to the left of the power light that has a caution symbol by it.
Any time the power blinks the X4200 M2 goes down fast. I don't know that even a large UPS will stop this from happening. Any direction you can give would be appreciated.
Thanks!

I'm stuck with the same problem. Have you managed to resolve it?
Thank you,
Lovro

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X4200 M2 main system power goes out even with UPS

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