There was a time where some of the Trav'lers did not have enough slack in the base where the control cable connects. It has the same plug as is in the back of the controller and if that gets loose it will cause an intermittent connection and then no connection. I would go "upstairs" if you can and remove the cover plate with the 4 screws. You will see the black control cable continue on inside. Pull VERY GENTLY on this cable until you see the male/female connection. I like to disconnect it and put a tiny bit of dielectric grease in the fitting and then reconnect it. I usually connect and disconnect a number of times in case there's any corrosion. You should also be able to tell if there is or way any moisture in here. If there is any indication of water you have a whole different issue to deal with.
