The answer to 'junction box power surge' is that a power surge in a junction box is typically caused by an electrical overload, faulty wiring, or a lightning strike. Symptoms may include flickering lights, tripped circuit breakers, and damaged electrical devices. Solutions can include replacing the junction box, upgrading the electrical panel, and installing surge protectors.
In most cases, a power surge in a junction box requires the expertise of a licensed electrician. DIY repairs can be dangerous and may not resolve the underlying issue. It's best to call a professional to diagnose the problem, make necessary repairs, and ensure the electrical system is safe and up to code.