Stuck in the Old Guns Quest for the Minutemen Fort.
Once you've opened the castle armory door and assigned some random settler to an artillery canon, the radio emitter (witch was working perfeclty well before that) won't be powered anymore.
Yes the power generator is running, yes it is connected to the radio emitter, and yes the 10 power units needed appear green when in workshop mode. I haven't changed anything from when it was working.
I have tried changing the generator's position, constructing a new one, changing the copper cables, turning the radio emitter switches on and off and on and off and on and off, etc, etc..
The settler assigned to the radio just keeps telling me it needs power before he can use it.
It prevents me from completing this quest and is a total fun killer..