A door that won't budge, or one that moves a few inches and stops, is usually a broken spring - the opener isn't strong enough to lift the door's full weight alone, so it stalls or reverses. If the door slams down instead of lowering smoothly, that's the same failure from the other direction: nothing left holding the weight on the way down.
A loud bang followed by the door refusing to move at all, especially on a cold morning, points to a torsion spring giving out under the extra strain that cold puts on old steel - this area sees the same severe winter cold the whole region does, and it's harder on decades-old springs than on new ones.
Grinding or clicking from the opener with no door movement usually means a stripped gear, common on units old enough to match a 1981-built house. A door that opens fine but won't close, or reverses right before touching the floor, is almost always a misaligned or dirty safety sensor - an easy check, but one people often skip before calling.