So I got the Castle, I wanted to make it my main settlement so I sent settlers there. I built a bell so I could get everyone together to assign them. Rang the bell and the minuteman who was manning the radio tower got up and turned off the radio. Now I can't get him to sit back down and he keeps telling me the radio tower needs power (of which it has plenty) before he can broadcast again.

This has locked me out of completing the Old Guns quest. I can't call in an artillery strike without the radio tower being active. But it can't be active unless the guy will sit down. Can anyone help me? I am on the PS4.