Genie Mini remote stopped working. - DirecTV

One of our Genie Mini remotes has stopped working. No functions work except turning TV on and off. Can't change DTV channels, or get Menu or program Info, or access recordings, or change volume. Have several other DirecTVs - all their remotes work fine. Tried resetting Mini (red button) - no change. Changed remote's batteries twice - no change. Pressing any button on remote causes green light to shine for 1-2 seconds, but can't change channel, volume, etc....
What do you suggest?

This question, "Genie Mini remote stopped working.," is about DirecTV channels, programming, equipment, and sports.