Cooked shutter relays?

Hi all,
A year back i was doing some maintenance work at my place which required an additional length of pink cat5. I knew i had some in the ceiling space in my alfresco. I cut it while it was live and then closed my access hatch hich was metallic. Assuming the cable shorted afterwards and my shutter relays(12 of ) have never worked since. All blinds opperated for a few seconds then stopped.
They are all disconnected from the bus and the system works fine but whenever i introduce 1 or all the bus seems to bug out and stop functioning. All lighting freezes in whatever state its in. Edlts are still active yet no inputs activate an output. All leds local to switches operate yet dont trigger realy/dimmer its mapped too. Also shutter relays have no unit or cbus light present but blinds can be manually operated through open and close buttons from front of when connected to bus. Any help would be appreciated.