Electricity can be tricky. The problem usually isn’t as apparent as it seems – it can be behind a wall, in the attic, in a connection, or even in all these places at once. It takes an experienced electrician to find and fix the problem.
Finding the problem and fixing the problem is often the same thing. Finding is usually the hardest part – it can be anywhere
When we troubleshoot a circuit, we go through the entire circuit. We tighten all connections and check/replace the breaker if necessary.