Reparing the Fabula. The speaker and battery cables were broken at the soldering point. No idea why. Also, it isn't the first time it happens. They are common Dupont cables cut and soldered (because I need the connector on the other end). They shouldn't be subject to mechanic stress, it seems more like a chimical/oxidation problem... but I have no clue at all...

#electronics #repair #workbench #lab #soldering #opensourcehardware