Chamberlain 41A5021-5I Logic Board Genuine Original Equipment Manufacturer (OEM) Part LiftMaster Opener Receiver Logic Board replacement for board numbers 41A5021-5E, 41A5021-5F 41A5021-5H, 41A5021-5I, 41A5021-5G Match the 41Axxxx-xx part number found on the control panel of your garage door opener.