We have a TORO Vision I system...not sure how old it is. I have never had a manual, and thus have always simply operated it on the manual method. There are 6 zones. Hubby and I checked all of the heads, etc. on Saturday, and all zones were coming on fine. Yesterday, zone 6 refused to start. Question: does anyone know: are all of the valves in the large valve box and would this be where the solenoid is? Or would there be a valve buried in each zone? Should I unscrew the bottom of the control box ...