Recently had an Internal PSU fail on an Icom 970. Fault was traced to a
resistor going short due to some adhesive used at manufacturing becoming
conductive with age? anyway resistor replaced gunk cleaned away. While
repairing it was noticed the circuit has an optical switch in the start up
circuit. This lost a leg when the short took place and despite repair it
appears not too work.
Havent tried Icom as they seem to be quite useless, order replacement VFO
assembly and received notch filter switch!

The device is a small black encapsulated unit, looks like a 4 legged black
capacitor! It is Neon rather than LED according to the circuit diagram. Cant
seem to find anything on it at all on the net. Appears to have been made by
a company called Stuaw Kigai.

Anybody got any suggestions ?