Have had my opensprinkler system for a few years now, and noticed the sprinklers were not turning on. After investigation, i found if i unplug or plug the power, the screen flashes yellow for 0.5 second, then nothing. At one power cycle, i got a chattering sound liek a relay, but nothing else, all other times have been the brief flash, then nothing. Is there anything else i can test on the board. Visually everything looks OK.
I did notice that the transformer is outputting 30VAC – would this be considered overvoltage and cause the unit to shut down? I don’t have another transformer here to test
Thanks