Well it depends on a couple things. The first being if you know how to work on electronics and the second is how far are you willing to go to fix them. If its just a wire problem you can splice in some new wiring or if its just broken at a connection point you are good if you can solder. If they have failed completely find a junker with working electronics and move the electronics from the junker to your figure with bad electronics. I cant think of much else one can do to fix them.
