ok.. thanks… after i got everything back in the rack today it's all working, but not optimally. i think the fault is just the toft board for being pretty quiet in my experience. i really have to crank and sends and returns to get it to sound normal.
i still don't get anything at all on the 7600 LEDs, even when the signal sounds OK. i guess the sound is what really matters.. i don't really care if i see activity on the LEDs or not, it's just strange they don't show activity.
they do light up on power-up, though, so they're not burned out or anything.