Now, now, you will need schematics for the machine, but it seems the board with the green lights is the motor drives combined in one board, the one at the right side is the motion control board and the small one should be some termination boards for inputs and out puts.

So at this stage you are pretty sure the board is faulty, right? No way to take it down send to them and they repair for cheap?

If the answer to previous is no, then you need to ask them for the schematics so we see what type of signals it sends to drives, at what voltage and so on, also what else it does and what cables enter and go out from the board. Now somebody experienced with retrofits in your area could figure which is which and what is what very fast.

If they don't send you the schematics the thing to do is see motors name plate, figure motor size, figure at what voltage are driven / transformer output/ rip all out and fit all in one board like that MX3660, its breakout board and 3 drivers integrated. Its LPT compared to the one i said before which is Ethernet but has drives integrated and from all reports is a very nice combo.