You press the remote from the driveway and hear the motor hum overhead, a steady drone with no movement behind it. The door stays shut.
Press the button and the opener hums for a second, then quits. The trolley is jammed hard against a bolt at the very end of the rail near the motor and will not budge in either direction.
After the power came back you pulled the red cord to get the car out. Since reconnecting, the door stops short of the floor, and no amount of turning the limit adjustment brings it the rest of the way down.
You want the ceiling back. A storage loft, a vehicle lift or kayak racks would fit if the long rail and motor box were not hanging in the middle of the garage, and the low ceiling of an older house leaves little room for the standard rail anyway.
Since shelving went up along the garage wall, the door will not close and both sensor lights are dead. A screw or staple may have gone through the thin wire that runs from the opener to the sensors.
Someone in the family tried to add a remote, held the button on the ceiling unit a little too long, and now every remote in the house is dead at once. The wall control still moves the door.
A smart hub arrived in the mail with a coin-cell sensor and two wires. The instructions ask what colour your learn button is and how old the opener is.
Someone pulled the cord last spring to get a car out during an outage, and the door has never properly rejoined the opener. Press the button and the trolley glides along the rail by itself while the door stays exactly where it is.