I have a garage door opener model 139.53966SRT1. The red light on the button pad blinks.
If your button pad light is blinking, this normally indicates that the lock is on if it has this feature. Press and hold the LOCK button for two deliberate seconds. The light should stop flashing.
You may need to reprogram some or all of the remotes. If the memory of the unit is full, you may need to erase all codes and reprogram all of the remotes from scratch.Here is a link for the owner's manual for your garage door opener in case you need it: Owner's ManualMember
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