A door installed around 1988 was built to a different standard than what goes up today. Expect single-layer steel sections without foam insulation, extension springs mounted along the horizontal track rather than torsion springs over the header, and openers that predate rolling-code security - some still running the same remote code since the day they were installed. None of that is unsafe by itself, but extension spring systems need their safety cables checked, since a snapped spring on that setup can send hardware across the garage instead of staying contained. If your opener still uses a switch-style wall button with no keypad, that's consistent with the era too. We'll tell you straight when a repair on a door this old is worth doing versus when the drums, springs, and opener are all near the end together and replacement makes more financial sense than three separate fixes over two years.