No power in bedroom or bathroom
No power in bedroom or bathroom. We found the correct circuit breaker and it was not tripped. We turned the breaker of and back on and also turned the main off and back on. No difference. Switched the circuit breaker with one that we knew worked and still no power. We are thinking that a wire came off in a receptical, but have no wiring diagram. Can we use a circuit tester to find the problem? How is this done and where do we get a circuit tester and how is it done?