In this case follow these instructions. Remove the screws that ties the new board to the housing.
Swap the board from the new housing. Replace it in your old housing.Put the board back in his place on the operator. We always ensure board compatibility. You will receive a perfectly and compatible replacement board that will fit your operator. THIS IS AN OEM LIFTMASTER PART THAT IS A REPLACEMENT PART FOR THE SEARS CRAFTSMAN GARAGE DOOR OPENERS. The item "Sears Craftsman 139.53661 Garage Door Opener Replacement Logic Board Assembly" is in sale since Saturday, August 29, 2015. This item is in the category "Home & Garden\Home Improvement\Building & Hardware\Garage Doors & Openers\Opener Parts". The seller is "gate_openers_unlimited" and is located in Miami, Florida. This item can be shipped to United States, Canada.