Broken wire perhaps? The power wire goes out from the power driver board and goes from one solenoid to another. Look at all the solenoids that aren't working. They all should have 2 wires going to one lug (except the last solenoid on that line) and one wire from the other lug. The wire that's the same on all the solenoids, that is doubled up on all solenoids, is the power feed. Check all the solenoids to make sure that wire is attached on every one. In your case this would be a purple wire with yellow stripe.