Some of this is genuinely DIY. Reprogramming a remote, replacing a burnt-out light bulb or a worn weatherstrip on the bottom of the opener's travel limit, cleaning the photo-eye sensors - all reasonable for a homeowner with a ladder and a manual. Swapping a drive gear kit inside the opener head is also within reach for someone comfortable working with the cover off and the power disconnected, and kits usually come with instructions. What we'd steer you away from: anything involving the torsion spring system on the door itself, which is a separate and dangerous piece of hardware from the opener and not forgiving of mistakes, and diagnosing a dead logic board versus a dead motor capacitor without a multimeter, since replacing the wrong part means paying for a part you didn't need. With 319 households in Summertown, a lot of these systems are original, so if you're not sure what decade your opener is from, that's worth finding out before you start ordering parts.