What was found
ON BOARDING, NOTICED THAT EMER LIGHTS ON MSG, SHOWING WHILE IN ARM POSITION. CYCLED BOTH FLIGHT ATTENDANT SWITCH & COCKPIT SWITCH LIGHTS ALWAYS ON IN THE ARM POSITION. CYCLED CB'S S11, POWER SENSORS, & U3 EMER LIGHT. WITH APU POWERED, EMER TROUBLE SHOT, OPERATIONS CHECKED OK FROM FLIGHT ATTENDANT & COCKPIT SWITCHES IAW AMM TASK 33-51-00-210-802. CONFIG A010 OK FOR SERVICE.