OpenSprinkler › Forums › Hardware Questions › OpenSprinkler › OpenSprinkler 3.0 A/C. Won't power up. › Reply To: OpenSprinkler 3.0 A/C. Won't power up. May 15, 2019 at 9:17 pm #60391 [email protected]Participant Looks like it may just be my power adapter. Volt meter not registering anything. I’ll get an other one and give it an other try.