Thank you for your input Z-man!
Yes, I do have power to the expansion cabinet and I did power up the expansion cabinet first. I fooled with the board connector quite a bit also. I finally decided that it was completely seated when the top and bottom little standoffs on the outside of the cabinet were touching each other. I can't imagine what could possibily be defective with an expansion cabinet causing the processor in the main cabinet not to fully load, it's just a backplane board with bus connectors.
Going back in this morning to recheck everything. I'll start with reseating the expansion cabinet.
Still open to suggestions...