You did good getting two of them working again. I would think the 3rd has just quit. Why they all quit at the same time is a mystery though.

don,

I don't know if the Craftsman are the same as my Chamberlin belt drives or if it would be related at all....Someone hit an electrical transformer and my power surged on and off about 3 times in rapid succession. All of my remotes had to be reprogrammed, including the wireless ones mounted on the outside. I again had the same issue once again when lightning struck nearby. Would those surges have cleared the memory?

I've not heard of these things erasing the memory but anything goes with electronics and surges. Maybe a good surge suppressor is in order although I have serious doubts about suppressing lightning. Some people swear by them.