Our remotes have the big button and two smaller buttons for 3 doors. We only use 2 buttons. Suddenly one garage door opener no longer opens with any of the programmed remotes.

I did not change the batteries as all the remotes still open the other garage door. I have done no maintenance, or bothered the openers. There is no new interference known. I have unplugged and reset the unit and I have also tried to reprogram.

The units are approx. 12 years old.

I read something on here about a "receiver" which I assume is in the opener unit. Is that something I can replace easily? BTW, the antenna seems fine as well.

Thanks for any ideas.