So fixing a new connection between the IC chip and voltage regulator has worked, we have a reading again of 4.9V. So comes the power up check....
No, no, no. Alas, even though meter readings show the power is running through the circuit, the LED is not illuminated nor can I get a single sound out of the nocto loco. I have looked over all the solder points and they aren't touching each other or frayed. It might just have been when the octave and pulse switches were soldered on the wrong side of the PCB board, now shorting out or something. Once again through solder-sucking to fix the past problem some contacts now look a little patchy.
More problem solving is required, for another day I thinks.
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