So I’m a DIY guy obviously but not a certified electrician, the preschool my wife and I purchased almost 2 years ago has two overhead incandescent light fixtures that suddenly stopped working. My father-in-law replaced the bulbs which didn’t fix the problem. He suggested an electrician. I ended up Checking for power at the wire nuts and found none? There is power at the light switch however. My question is do switches go bad often? Not sure how old this switch is but for a buck or 2 I can swap it out. The breaker is functioning fine because there is another switch on the same circuit that works. Am I on the right track?