I have purchased Optiplex 9020 MT few months back and last month I get another one for my brother.
I have noticed strange behaviour ( may be it is normal) but I want to confirm what is happening when I power up from UPS/Direct connection.
It get blink DVD , HDD and Power amber light once. After that it is working fine and no issue.
Here I created video for that behaviour so It help you what I am trying to say.
