Although my elevator trim works great, the two D10 EMS elevator trim position white triangle indicators recently stopped working. They either flop around or don't show up at all. The Ray Allen servo potentiometer (orange,green,blue wires) checks good. The D10 pins were reset and continuity checks on all wires are good. The elevator set up procedure was redone. No luck. Could it be something in the D10 EMS that failed? Thanks!