SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

We moved into a new house 6 months ago. A few months ago my husband noticed a few sprinkler heads in the ground while mowing. Just this weekend I remembered this and located the control box in our garage. The box was unplugged from the wall. I read the manual and then this morning I set the correct time, date, set up a schedule for the different zones, etc. I then tried to manually run the zones/stations and I'm getting nothing. I switched the rain sensor to bypass b/c it is raining today and I have no idea if there really is a sensor anyways. Still nothing. We are DIYers and would love to have this system working. We have never had an irrigation system before so we don't know where to start. Could someone point me in the right direction of what to start checking to see if this system is completely hooked up? I imagine it may have been years since the system was working, but I can't imagine someone would go to the trouble of having the box and sprinklers installed and not have the whole system working at some point. Thanks!