The complaint we hear most from this stretch of New Hope is a door that groans or jerks partway up, then catches. On houses built around 1969, that's almost always the torsion spring losing tension after decades of winter cold and summer heat cycling the steel - cold band winters here mean more freeze-thaw stress on hardware than in a milder climate, and springs that age out don't fail gently, they fail suddenly.
A close second is an opener that runs but the door barely lifts, or reverses right after it starts closing. That's usually the drive gear stripped inside the opener housing, a common failure point on units that are themselves 20 or more years old in a neighborhood where houses rarely get a second opener installed once the first one's working.
If you're hearing a grinding noise specifically on the way down, check the rollers before anything else - on original hardware from this era, roller bearings seize up long before the track itself wears out. Compare notes with the general service rundown at /garage-door-service-plymouth-mn if you're not sure which category your problem falls into.