Customer somehow inadvertently and accidentally moved the voltage selector switch from 220 to 110V, plugged in to hear a fair crack and now dead!
Fuse had blown – after putting a temporary fuse in, brought up power slowly, could hear some loud intermittent cracks I expect coming from a partially shorted capacitor (which took the brunt of the excess voltage, over its rated working voltage, hence fuse blown) which will need replacing but otherwise think everything else survived.
Two new capacitors were fitted (the circuit uses a pair for 240V operation so best swap both) and secured from vibration with some Dow Corning 744:
The voltage selection switch was also covered up with tape to avoid any further accidents!
