Swapping rollers or tightening loose hardware on a steel sectional door is within reach for a lot of owners, and we'd rather you do that safely yourself than pay a truck to do five minutes of work. Lubricating hinges and tracks twice a year is the same story.
What we won't talk you through over the phone is torsion spring work. A spring under tension on a door this size can put someone in the hospital, and that's true whether the door is a 1987 build or a 1960s one. If a spring has snapped, or the door won't stay up on its own, that's a call, not a weekend project.
One honest limitation: we don't carry every opener logic board for older chain-drive units on the truck, since some of those parts are only made to order now. If your opener needs one, expect a short wait on parts rather than a same-visit fix.