Replacing a photo-eye sensor or realigning one that's gotten bumped is something a lot of homeowners can do safely - it's low voltage, no stored tension involved. A torsion spring is a different matter. The spring on a standard double door is wound under real force, and the tools to do it safely (winding bars, a properly sized ladder, clamping the door first) aren't things most garages have lying around, and getting it wrong can break fingers or worse. If your opener is just making noise but still working, that's worth a look yourself first - tightening hardware and lubricating the track sometimes solves it. If the door won't move, or a cable's frayed, or a panel's dented enough to bind the track, that's a call, not a weekend project.