1. The first thing to try is restarting the sign itself. Turn off the breaker to the sign for approximately 15 seconds, then turn it back on. Wait till the sign start to play the messages again, then try to send the new messages to the sign.
2. Next item to test is the communication line. Use the Ping Program on your DCI supplied CD to test the connection between all radios and the sign. If you do not have this program or lost your CD, you can call Datatronic Control, Inc directly and we can email you over the program. The program will inform you if a certian component cannot establish a ping.
Once you have identified the component that cannot connect, call Datatronic Control, Inc. to speak with a technician. They will advise you any and all options available.