Hi Nick,
I assume you powered this Module up isolated. Thus all other Modules not connected in the TLA7000 Mainframe. In addition you also tried another Slot. This is a suggestion in the 077-0402-02 TLA7SA08 & TLA7SA16 Technical Reference Manual (last 2 pdf pages).
I also assume you installed the TMS160PCIE3_v6.0.267.0 Application Firmware. The Software for the Serial Analyzers isn't included in the "normal" TLA Application Software (this must be V5.8 at least).
UFDC Modules Tests are in the beginning of the Power-On and Extended Diagnostics Tests. TLA7AXX, TLA7BXX and TLA7SAXX's show this description. TLA7NX Modules show SFDC Modules Test. These need a Jumper for FW Reflash. TLA7AXX e.a. not. Maybe this is the area you must look to.
Succes,