> How do you know that the boards you already have have never been repaired? > > How do you identify non-original parts?
Good question indeed. How do I? Is it possible?
> You could pick > another game you are interested in that uses it and buy that as a complete boardset
Which games used the non-DASH 89626A-4 version of the A board? Unfortunately, the cps1.c file from the MAME source code doesn't list which game natively used what board?