A repair on a house in this part of the service area usually starts with checking the board and sensors before touching the motor, because board failure is what we see most on openers installed when these houses were built, around 2003. If the board's fried, we replace it and test the safety reverse and photo-eye alignment before we leave - that reverse test isn't optional, it's the thing that keeps a door from closing on a car bumper or a kid's bike. If the motor itself has gone, chain stripped or gear teeth sheared, that's a motor and gear kit, not a board swap. One honest limitation: if the opener is a discontinued model with no board or motor available anywhere, replacement is cheaper and faster than hunting down an obsolete part, and we'll tell you that straight instead of chasing a part that doesn't exist anymore.