I was reading through these old message threads to get some ideas about a problem I was having with my garage door opener remote control.
The remote would quit working every so often.
It turns out the neighbor's remote control transmitter for his garage door opener was occasionally being stuck continuously on. This was interfering with my garage door opener receiver. I have a Sears (1996) vintage garage door opener. In hindsight I determined how the interference was evident because the green LED indicator next to the "SRT" programming button was continuously flashing during the periods the remote control was not working. This LED only flashes when the receiver is receiving a remote control signal.