Analogue systems

I think I might have blown up some modules. I plugged in my new RS240 
Bode filter, and none of the lights came on. I pulled it out and 
reseated the cable and the LED's lit up and it passes signal fine. The 
problem is my two RS95 oscillators, and the VCA no longer generate or 
pass signal. And on my VC-LFO, RS-80, the LED does not blink like my 
Doepfer LFO's do.

Did I kill something ?

Rob