Hi -
I just posted a thread on my experience on a non starter pro version.
In my case it was a power problem on the mb pwr conn.
I had the same start up attitude: 00 on the display and no activity.
Start out with only a single ram module and try every slot with a reboot.
The cpu 2011 socket is renown for problems with the tiny multi connection fingers.
It only takes a credit card dropped on the open connector, and you are in serious trouble.
Hope you get more comments, as I would benefit from that too