If your retic doesn’t come on then it will usually be one of a few common problems.
1. The controller is faulty. If there is a display on the controller then it is less likely that this is the issue, but it could be a faulty terminal or circuit board.
2. The master solenoid has seized. It has got stuck shut and needs replacing.
3. There is a broken wire to the master solenoid or a broken common wire. If you have done some digging in the yard then you may have accidentally struck wires. They are only 24v so you won’t notice any ‘shock’, but it will stop the system working.
4. If you get an MV error then this let’s you know the coil on the master valve has problems and needs replacing.