The electrical components of an automatic sprinkler system generally consist of a Controller, Power Source, Electric Valves, Wiring and a Rain Switch to cut power from the controller when activated. All of these components are subject to power surges, lightning, shorts, impact damage and even damage by pets. I will do my best to troubleshoot, identify and isolate electrical problems by using electronic diagnostic equipment, and by interviewing the contact person regarding recent system behavior. **** Note, it is very important to know who might have been digging on the property recently****. About half of all electrical problems are related to digging in the yard by avid gardeners, handy men or the utility companies. Every bit of information can be very important in identifying and resolving mysterious electrical issues.