My ROW signal has decided to throw me a curve, I wonder if this is fixable or not. For those not familiar the function much the same as the MTH signals, red show if the block is occupied, once it clears amber shows for a period of time, then green. I have this wired through a Z 1008 relay so the green should show when the block is unoccupied. My issue is the green no longer shows. Prior to failing the green signal flickered over the course of several weeks but would stay on after a minute or so. I took this off the layout and wired it directly to rule out the relay as a problem. The red works fine, when I wire it for the green signal, the amber lights as usual then the signal goes dark. It seems the issue is in the small board that drives the lights but I can see no obvious issue. Any thoughts? Is this user repairable or something to be tossed and replaced with something else?