Thanks for your help.
I returned the defective item.
They are offering another one in exchange or full refund.
However, there is a red led inside the case of the other unit blinking/turned on.
Is that alarming ? do you know ? Is it in error condition ?
Or just a power/status led or is it showing that no network connectivity?
Can I take it ? They can only do power on testing, and not any other kind of tests.
Otherwise only the PSU led is turned on this another unit.