Are you using the serial cables that came with the arrays?   Did the serial setup work before you removed it from the group?  Since it's unlikely that both serial ports are dead, it usually is something with the cable(s) you are using.  9600,N,8,1  NO Flowcontrol.   Cisco cables won't work they are wired incorrectly. 
Greetings, Can anyone tell me why the comm ports on both controllers of an array are not communicating ( they are black..no amber and no green lights)? I recently removed it from a group to re-add it to another group.  HitKit could not find it then when I went down to the server room to look at it...all com ports are black.  Not a problem with the switch as I tested other connections.  Both controllers showing green status lights. Figured I'd ask here first before calling Tech Support. Thanks  
PS5000s