Hoang Nguyen An Binh

I'm using UMAC system with Turbo Pmac2 CPU, 1 servo ICs ACC24EA, they're all put into ACC-U10 UBUS Backplane. One day, I tried to registered a PComm32.dll into my laptop with connected with the UMAC by ethernet, suddenly, the servo ICs is disconnected from the system. I checked and found that the 2 PWR led were off and 4 ENC led were amber instead of green. What should I do to make the ACC-24E2A be recognized in the system again ?