I put sone w/w Rs on the outputs and monitored voltages, a few tenths of
volts + on + and - on -, except one of the 5V, not even a mV, so perhaps a
duff C on board of SM that is obscured by heatsinks etc. Just with the 10 or
so pings a second of drive, that drops back to 1 a second with half mains,
the voltage supply over the 3842 stays constant at 13.6V so supplying itself
, not just startup supply. I'll have to start dismantling to trace that 5 V
section but other people's repairs take presedence for the moment.