A torsion spring under tension is not a homeowner repair - that's true everywhere, not just here, and it's worth saying plainly since it's one job that injures people badly. Where Coopersville owners can reasonably do their own work: lubricating hinges and rollers once a season, tightening loose track bolts, and replacing worn weatherstripping along the bottom, all low-risk and cheap. Opener remote reprogramming is also fine to do yourself with the manual. What we'd steer you away from is pulling a 1988-vintage door off its track to inspect a cable - the drums and cable anchoring from that era don't match current hardware, and rehanging it wrong is a bigger job than the one you started with. If a door this age needs more than a spring and some hinges, we'll tell you honestly when replacement is the better money than another round of repairs, rather than stacking parts onto a door that's already near the end of its service life.