The automatic sink was not turning on. We removed the cover for the solenoid and noticed that the power light was no turning on. We removed the battery pack and changed out the batteries with new AA batteries. We replaced the battery pack and the power light came on. We tested the sink and it functioned normally. RESOLUTION/RECOMMENDATIONS: Replaced vacuum breaker in Sloan V500-A toilet. Replaced batteries in automatic sink. Both tested after repairs and they are functional with no leaks.