Maybe they meant that they fixed the problem by putting the NOAC in something else, indicating that the problems aren't in the NOAC, but the Superjoy's supporting circuitry.
Yeah, I took off the ribbon cable connecting the NOAC board to the controller board (where the problem was), and then I just directly connected all the devices to the NOAC board, so the problem was either in the ribbon cable or the controller board. It works, I really don't worry about it.
The Super Joy's sound faults (e.g. samples playing to loudly or as static and FM playing too softly and distorted) are in the NOAC/FOAC. It varies from chip to chip though, the build quality is so low that no 2 are truly alike. If you get NO sound though, that's probably a loose connection or dry solder joint on one of the leads. Almost none of the wires are insulated and are actually glued in place, not soldered, in many cases.
