What was found
UPON DOING POWER ON CHECKLIST, INTERIOR EMERGENCY LIGHTS BEHIND PASSENGER SEAT 4 AT THE GALLEY, AND EMERGENCY LIGHT OVER PASSENGER SEAT 9 ARE INOP. OVER WING AFT EMERGENCY EXTERIOR LIGHT IS ONLY HALF ILLUMINATED AS WELL. AFTER APPLYING AIRCRAFT POWER WITH AIRCRAFT BATTERIES AND APU GENERATOR, THESE 3 LIGHTS RESUMED NORMAL OPERATION. DURING THE COMPLETION OF TASK CARD TC-FLT-33-1001, IT WAS FOUND THAT SOME OF THE EMERGENCY EXIT LIGHTING WOULD NOT ILLUMINATE. REMOVED NR 2 POWER SUPPLY FROM SERVICE AND INSTALLED IAW AMM 33-50-10 A REPAIRED NR 2 POWER SUPPLY OPS TESTED SATISFACTORY.