Our garage door remotes(3 of them) all stopped working. The wired connection on the wall opens/closes the door fine. The car remotes, for 2 different models of cars, all stopped working at the same time but they work fine if we're not at home.
The garage door remotes work if I'm within a couple feet of the 'wire'.
I've disconnected our computer router and show no other routers within the area.
What could be interfering with our signal??

Did you try new batterys?

I was awake almost all night thinking about what was screwing up my remote signal for the garge door and the cars. At 6:00 AM I realized that there was walkie/talkies plugged in to charge right above the garage door (they were not ON). I unplugged them and everything worked normal. Problem solved.

Strange but I am glad you figured it out.