My DN9650 with USB card was working fine with my Mac and Pro1 until I moved it. It is kept in a rack with 2 DL153 stageboxes. Once it was hooked up in the new location, it does not recognize AES50 connection. After checking and swapping cables around I determined that the cable is not my problem.

The led just flickers on the back of the unit and the Pro1 does not recognize it as connected.

I am hoping for someone to give me some pointers for troubleshooting this issue. 
The DN 9650 has never toured. In fact it has only been moved one time. It is very pampered