Lights in kitchen and dinning room out....I checked chandelier fixture in dining room because it was closer to water leak area.....found no damage, corrosion, or rust....checked panel found dual function; arc fault/gfci, protection electrical breaker in tripped position and would not reset.....changed duel function protection electrical breaker and tested all other duel function protection electrical breaker for proper function...... also noticed burned wire on a separate electrical breaker and the electrical breaker was not tripped, a closer look found the setscrew was never tightened....wire was allowed to heat without protection from electrical breaker safety device....removed damaged wire and replaced electrical breaker that was protecting the bathroom gfci electrical circuit.....