Power outage may have included surge that damaged microprocessor.
Surge likely toasted the board. Replace with Hunter Pro-C or HC (WiFi).
Hunter Pro-C Shows Running But No Water: Test Controller Voltage Output
Hunter EC400 Garbled Display: LCD or Microprocessor Failure — Replace Controller
Rain Dial Controller Turns All Valves On After Power Interruption
Hunter SRC Plus Two Zones Not Working: Electrical Troubleshooting
Hardie RD-600 Display Frozen After Power Outage: Controller Failure
Replace Rain Jet Timer: Use Rain Bird SST at Home Depot
Hunter SRC Plus Unreliable After 6 Years: Replace Controller
Hardie TC-800 Adding 5th Zone to Schedule—Program Structure
Sprinkler Solenoid Testing After Controller Voltage Confirmed—Ohmmeter Method
Hunter Controller Zone Running Too Long: Programming Error or Hardware Failure?
Hunter EC 'NO AC' Error After Siding Work: Transformer or Controller Fault?
Recurring Hunter XC Controller Failures: Wiring Short or Solenoid Issue?
Finding a Manual for an Unknown Sprinkler Controller: Coast Water Works Resource
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