1. Check to make sure that there is power to your sign. Check any breaker boxes that may have been tripped by external sources. If the sign does not play and the power is on, contact a techncian for further troubleshooting.
2. If there is power to your sign, then upload a new schedule to your sign. The sign will display as blank if no schedule is set to run. Often customers will schedule messages to play for long periods of time and leave the sign alone until the schedule runs out.