JD3_P and JD4_N , they can not output any signals.
D3_P and JD4_N are not output , they are can not output any signals.
2 gpios of pmod are broken
I assume you've tried out several other PMod I/Os as well and have verified your code works with other I/Os.
If your board purchase is within the warranty window, you can contact the organization through whom you bought the board and request an RMA.
Bryan
