Hi there. I have done as you suggested – first plugging it in to a synth (my wife’s electric piano) and then tried it via two different sound cards with no result. Not a flicker.
I have a friend who does electronics for a living and he’s coming round with his desoldering gun on Saturday morning; we will
Probably remove the sections that are problematic and resolder them. I doubt if that will work however as the solder doesn’t look like it is the problem…
Cheers
Innes