Did you ever get this working? I had similar issues with my A3000T. Turned out to be the CSMKII card and its on board oscillator. I had to reseat the card and also make sure the oscillator was seated in firmly by bending the pins. It was apparently not getting a good connection. It now works great.
A little tip. When you first power on the A3000T the green LED will start to blink immediately. If it does not blink, something is wrong and it will not boot. (CPU problem?)
