There are some similar posts, but none of them really solve my problem.

I've got 3 zone Toro sprinkler system worked for about 10 years. Recently, one zone(1) stopped working. I changed solenoid of the valve, no luck. I swapped solenoid with another valve, it worked fine. I can manually tune on the zone, but not automatically. I can hear the electrical connection on the top of the valve buzzing, but no water comes out. What is really wrong? Any suggestion?

I couldn't attach the valve photo directly. Here is the link.

http://img78.imageshack.us/img78/807/dsc0037rq0.jpg

Many thanks!

Here is a link that might be useful: {{gwi:329715}}