The answer to 'why is my electrical panel not working' is that there are several common causes, including tripped circuit breakers, faulty circuit breakers, loose connections, outdated or damaged panels, and overloaded circuits. Symptoms may include flickering or dimming lights, outlets that don't work, or the entire panel not powering on.
If you're experiencing issues with your electrical panel, first check the circuit breakers to see if any have tripped. Try resetting them by switching the breaker all the way off and then back on. If the breaker trips again, there may be an issue with that circuit that needs to be addressed. You can also check for loose connections by tightening the screws on the panel cover and individual breakers.