Thanks everyone for your input
. I especially appreciate comments from J2B who seems to be a licensed electrician.
I have not had time to get into this problem this weekend. My son & his fiance are visiting, along with her parents from Connecticut. There is a bridal shower going on today, and, although my son would be a great help to move things, there just isn't time to get at this problem.
My son is getting my old SongTowers. When he said he would love to have them, I gave up trying to sell them. I had transported one of them up to where he lives in NY the other week. Tomorrow the other one goes north with him.
Thanks for clarifying that.
Of a pair of outlets in one junction box, a duplex, one works and the other does not.
To my knowledge neither outlet of this duplex is switched. I do have switched outlets in all the bedrooms of my house, but not the family room.
For what it's worth, I've had my AV gear installed this way since January 2000.
Although I don't think I have rats, I did catch a mouse in the house the other week. I've never seen a field mouse with teeth big enough to bite 14g Romex. There was one and only one mouse. I left traps out for another 3 days, without catching any more.