The answer to 'my junction box won't turn on' is that there could be several common causes, such as a tripped circuit breaker, a faulty light switch or outlet, or a problem with the wiring. Symptoms may include no power to the junction box, lights or outlets not working, and potentially a tripped circuit breaker. Solutions can range from resetting the circuit breaker to replacing a faulty switch or outlet, but more complex issues may require the expertise of a professional electrician.
If the problem is a simple tripped circuit breaker or a faulty switch or outlet, you may be able to troubleshoot and fix it yourself. However, if the issue involves more complex wiring or electrical components, it's best to call a licensed and experienced electrician to diagnose and resolve the problem safely.