I have the problem that many others have had here except that my door has stopped working with the universal remote (roof of the GM car) ONLY. The Lift-Master remotes work well. Initially, it was just the Buick, but now the Chevy is having the same problem. On occasion, it will open after 10+ tries.
I'm stumped both cars were able to open the unit when they were set-up. About 6 months later the Buick quit; then the Chevy. There are no CFL bulbs in close proximity. Nothing has changed in the garage since we moved in the house 5 years ago. And nothing changed in either auto.
Any ideas? My thanks to you all!