You can do some of this yourself. Wipe down the tracks, check that the photo-eye sensors are aligned and clean, and look at the springs for visible rust or gaps in the coil - don't touch the springs themselves, they're under enough tension to break a hand. Lubricate rollers and hinges with a garage-door-specific lube, not WD-40, which washes grease out rather than replacing it. Test the auto-reverse by setting a 2x4 flat under the door and closing it; it should reverse on contact. What you shouldn't do yourself: balance adjustments, cable tensioning, or anything involving the spring anchor brackets. A door that's out of balance will fight the opener motor every single cycle, and that wear adds up fast on hardware that's already pushing 35 years old in a lot of West Linn homes.