The most common pattern we see on doors from this era is a frayed cable that finally lets go on a cold morning - the wire's been shedding thin strands for months, catching on work gloves, leaving rust streaks on the track, and nobody noticed until it parted. Another pattern is a door that goes crooked on the way up, one side lifting faster than the other, which usually means one cable has slipped its drum groove rather than broken outright. Either way, on original 1997 hardware, the cable is rarely the only thing that's tired - the drums underneath it have usually earned a look too.