I have a customer whose irrigation zones nine and up won't turn on from the timer but they do if you manually open the valve. I switched a couple of the zones on the board to see if the board was faulty but it isn't, so far as I can tell. The zones all worked prior to the system being turned off for the winter. There are two valves whose solenoids I recently replaced in hopes that they would stop leaking but it seems that their diaphragms want replacing instead (one leaks, the other constantly runs unless it's clamped down all the way and the valve box is flooded). All of the wires appear sound and I can't find any evidence of tampering this time. The timer is a rainbird esp-24mc, any thoughts?