Schindler 330 Fire Service Issue

I have a 4-car group of Schindler 330A's and Car 3 has a Phase 2 Fire Service Issue. The car goes in to Phase 2 Fire Service, the safety string is made up, the doors are closed, the Ready LED is on, but when the car call is placed inside the car, the call latches, but the car doesn't move. I have replaced the LON 16 board, the MRL board, and ohmed out the cable between the 2 boards and it checks good. The 5 safety string SKD's are lit, the drive is ready to run, but it won't move. The other 3 cars work fine on phase 2 fire service. And the car runs fine in Automatic and Inspection.

Any ideas on this problem?

See attached photos. This is a bank of 400A's, not 330's.