It turns out that it was actually as my reply from 2011 says. For some reason the person putting the Samsung together didn't see fit to anchor down the acrylic pcb strip where there is a mounting hole in the metal carriage thus allowing the pcb strip to bow out and catch on something on the frame of the camera which has mangled the pcb strip enough to cut some of the copper lines carrying the current to the various places. Taking the carriage apart looks a daunting prospect but I have taken a sequence of snapshots of how to unscrew everything in order, to be able to extract the carriage if anyone is interested?
Richard.
February 2012