thanks for the link
im still trying to figure this thing out.........
I feel weird about it cause i bought the cab only cause it had the mvs + 8 games with it........ & he told me it was 100% fonctional.....
for me a A button problem is like 20% fonctional
How can you play neo geo without A button it's the heart of the thing

I dusted the jamma harness + the pcb
see if it helps
i still get the same old problem...
.
Grrrr