The answer to 'my electrical repair won't turn on' is that there are several common causes, including a tripped circuit breaker, a faulty component, or a wiring issue. Symptoms may include the repair not powering on at all or intermittently turning off. Solutions can range from resetting the circuit breaker to replacing a damaged part or calling a professional electrician.
If the repair is something simple like a light fixture or outlet, you may be able to troubleshoot and fix it yourself. However, for more complex electrical issues or anything involving the main electrical panel, it's best to call a licensed electrician. Trying to DIY electrical work can be dangerous if you don't have the proper knowledge and experience.