Very hard to see (black boards are not helpful!) but to me the other leg of the switch you have a wire on doesn't look great - are you sure that it is connected? If it isn't it looks like you have a problem as I'm guessing all the left pins not having traces means they are connected to the diodes on the other side of the board. It is a commercial board though, so expecting any kind of pattern resembling common sense is optimistic.
A pic of a bigger section of the board might reveal something, if you can find a big light source to highlight lots of traces that would be good.