Craftsman 139.53413 garage door opener remote
I bought this house, which came with a garage door opener, a wall keypad, and no remotes. I looked online and saw that a Model 61LM remote control transmitter should work with my opener. I ordered a one-button one, but I can't get it to work. It's asking me to set 10 dip switches to match those on the opener, but I see no dip switches on the opener.