I searched previous posts on this topic and did not find an answer, so if I missed it, I appologize.
We have a residential Chamberlain Lift-Master =BD H.P. (Part No. 41A5021- E, Date: 04/00) garage door opener with a remote control problem; it continues to work fine with the regular 110V switch. (It worked fine with the remote up to the date it failed.)
I suspected the remote control needed a new battery, so I bought new batteries and replaced them in both remotes. That failed; I thought maybe the new batteries were bad, so I bought another set and again replaced the batteries; still no luck with either remote. What else can I check before calling for a service repair?
Thanks for any advice you can provide. Lee