Sprinkler Head Cover Sprinkler System Has Two Zones, One Works, Two Must Turn On By Hand.?

Sprinkler system has two zones, one works, two must turn on by hand.? - sprinkler head cover

I think the timer is running, even with the hand or the instant on, the field work one, but two on the top of the system go to where the pipe from the ground indicate that up side down U shape. two valves open and close the valve of zone two, the water flow pipe U-shaped in a box. (This version was a few months ago when I got up, and water shot into the air.) Then the second zone. The company has not returned with a load of service, what can I do?