If there is a problem with the illuminated address sign and you are willing to try to repair the sign yourself, this page will provide you with some information to help get you going on the repairs. It is in the format of a problem description and then the probable causes of the problem.
Before you get going, here is a breif description of how the circuit operates. On the controller, there is the photo detector and brightness control ciruitry. There is always power from the 24V adapter going to all of the boards in the sign. To turn on the sign and adjust the brightness, there is a control signal sent to all of the boards in the sign. The digit boards are run in parallel so the failure of one board should not cause the failure of the entire system.
On the connector to the display boards there should be the following voltages. From pin 1 to pin 3 there should be the adapter voltage of 24V or more. From pin 2 to pin 3 you should see approx 1.6V when on and less than 0.4V when off. Pin 1 is the top pin. Since the boards are in parallel, the voltage on all of the connectors should be the same for all of the boards. If it is not, then that would indicate a defective connection between the boards.
Attempting to repair the sign will not void the warranty. If you cannot get it to go, just send it back and it will be fixed.
If you find a problem that is not on this list, let me know so I can add it.
If you need spare parts, click here