Any word on these being fixed? Cannot complete the Constitution senario no matter what I try and the radioman at the Castle keeps telling me I need to fix the transmitter but nothing seems to work

there either and I cannot trade there at the moment. Saw where someone said a Console fix is available but do not want to go try that yet.

It's bugged on all three platforms for certain people it seems but, I have seen no actual acknowledgment Bethesda either confirm an issue or will fix it. Hope they do.

I just found out that I have this bug too. Completed the Old Guns mission long ado, the radio was working fine until I realized that it had gone silent some time ago. No matter how many generators I add, the problem persists. I opened the console and found out that I already had the value bAllowPlayerAssignment set to True. I can't assign a settler and the minuteman guy continues complaining that there is no power.

That svcks. It's stopped me from completing old guns on the PS4 which also stops me achieving a trophy. Are Bethesda actually working on another patch or have they all moved on to DLC?

If that the problem you have, there is a possible solution:

https://www.reddit.com/r/fo4/comments/3svima/caution_possible_bug_radio_transmitter_at_the/

Look down below, in the middle of the page.