What if my Lawn Sprinkler system does not turn on?

Is the clock in the "on" position?  Is the rain sensor wet?  Is the rain sensor constructed?  Has the rain sensor wire been cut?  Is it plugged into a GFI switch?  If it is, does the GFI switch have to be reset?  Is there power at the plug?  Is the fuse blown?  Are the 'A' and 'B' programs properly scheduled? If you are still having problems after all these concerns are checked, please call for service.