I think i know the answer but in hope of a solution...
acquired an IOM several months ago, virtually unused but around 6 year old build. professionally (??) built. fitted with a rather nice TITAN TORNADO winch servo. all in one unit taking 3s power and feeding the RX.
Worked fine racing saturday morning, returned home and no winch..power runs through and works RX/rudder. tried another RX, tested the channel outputs on RX, proved the +ve and -Ve leads both ways, tested the continuity of the signal lead from winch, resorted to break the waterproof seals and open it up - no evidence of any water ingress and at the end of what i can reasonably check myself...
Titan appear to have gone .... Is there anyone servicing these units or is it an expensive doorstop ???