The answer to 'my switch won't turn on' is that there could be several common causes, such as a tripped circuit breaker, a bad switch, or loose wiring. The symptoms may include the switch not clicking or the lights not turning on when you try to use the switch.
Some possible solutions include checking the circuit breaker, inspecting the switch for damage, and checking the wiring connections. If you're not comfortable working with electrical components, it's best to call a licensed electrician to diagnose and fix the issue safely.