Nothing. No light, no click, no hum from the unit on the ceiling.
The rail shakes when the door runs. The steel straps holding it to the ceiling have worked loose, the chain rattles the length of the garage, and a bolt has already dropped onto the hood of the car.
The belt looks fine from a distance, but up close the rubber has cracked across the back in dozens of places and, in one spot, you can see the steel cords showing through.
During the ice storm the power was off for two days. You came home in the dark, found the door dead, and had to climb out of the car to pull the red cord in the cold.
Someone backed the car in a little too far, a bin or a bicycle brushed the track, and since then the door starts to close and comes back up. One sensor now sits at a slightly different angle from the other.
After the move, the previous owner's remotes are somewhere in another city and the keypad on the outside wall wants a code nobody wrote down. The wall button works.
Your daughter gets home from school an hour before anyone else. She has lost two house keys this year, and the garage keypad code has been shared with half her class.
After a week of lifting the door by hand you pressed the button, hoping it would catch. Instead the motor grinds, the trolley thumps against the end of the rail, and the little lever that should snap back stays stubbornly upright.