Audio from jack appears… to be working fine. Obviously I am just going by ears and some songs playing, so I can’t tell if some minor frequency or noise is present.

Thanks.

Also updated the post with better quality image and another link added.

So I guess, what this means is having one scrapped off or failing isn’t a big issue (because of built-in redundancy accounting exactly for that)?

It’s like well, here I guess:

https://i.postimg.cc/XJNcnppT/modelblock-gaming-pd.png

You might be able to find a better resolution image of the board if you look, on them, it is written K72 then vertically smaller K2 (the 2 has an underline).

There are so many as you say, so makes me think, there’s enough redundancy to leave it be.