I had a working smr-4 filter board until I tried to swap the already in place standard 1u caps with fancy ones. It was a real pain to desolder and putting the replacements in and after this struggle I now have no sound left at all.
I tried swapping all the ic’s from my second (working) smr-4 and that didn’t help, so its not the ic’s I figure. Are there any components close to the 1u caps that I might have damaged/burned. I had to the soldering iron on that location quite a lot before i had the caps in place.
With one of the caps I had an issue that one pin didn’t want to connect properly because of residue. Is it possible that the sound completely disappears if one cap isn’t connected properly? Or is it more likely that I broke something else, for example the transistors?