[quote name='icastle' timestamp='1411502336' post='2560217']
Ah.
You know that saying 'a picture is worth a thousand words'?
The first picture shows a PCB that has been played with by someone.
The soldering on CN2 isn't great, the capacitor near the R1 label has had the hotglue scraped away and that capacitor strapped onto the back of CN2 doesn't look like it was originally there.
I'd be inclined to desolder one leg of that red capacitor and see what happens.
[/quote]
Thanks Ian.
I wonder why the capacitor was added.
Anyway, I will do as you suggest, although will leave it until after this weekends gig. Then if I get any bother, there will be a little more time for me to sort it before the next gig.