I've done a lot of my own sprinkler repairs over the years but have a new problem that I'm unfamiliar with - Valves. I repaired a leak in zone 4 last winter, and I still had only 1/2 the heads coming up after the leak repair. I stopped using that zone, this week I started to troubleshoot the zone and now no heads are coming up. I've read some posts re:troubleshooting zones and I have a couple of questions.

When I turn the bleed valve, some water comes out around the valve, but no heads come up in the zone. I can manually operate all other zones with their bleed valves.

Can I assume that I have a bad solenoid/valve? Or do I have to also test the volts? My understanding is that you s/b able to manually operate a zone even if volts are zero because it's bypassing electrical power when done with the bleed valve - so does this prove that minimally that the valve/solenoid is bad?

I have Richdel 205S valves and wonder if it would be easier to replace the entire valve vs. replacing the guts.