Springs past their cycle
That matters because a door and opener installed when a house was built is now old enough that springs have cycled out, rollers have worn grooves, and the opener logic board is a generation or two behind what's sold today. We work on torsion and extension spring setups from that era, sectional doors that have taken a hit from a car bumper or a basketball, and openers that have started grinding, reversing on their own, or just quit.