If i recall did you not ask about a ups months ago because of power issues?
If so did you get one?
And is you system plugged into one or the wall?
Exactly! It appears like the same issue, but that time it was the PSU that I RMAed. Now I tested the PSU that seems to be OK.
I had taken the UPS long ago, it was running OK, but when the power issues started, I plugged the system in the wall. I have just tried to start the system with the UPS without sucess.