What was found
CABIN EMERGENCY LIGHTS INOP FROM ROW 32 TO THE LAST ROW. SWAPPED BATTERIES FROM M736 & M737, NO HELP. REPLACED FUSES ON BATTERY PACK M737 AND REPLACED POWER SUPPLY IAW FIM TASK 33-51 FAULT TREE 802. LIGHTS IN ROWS MENTIONED COME ON INITIALLY WHEN SWITCHED EITHER IN FLIGHTDECK OR FA PANEL BUT EXTINGUISH AFTER A FEW SECONDS. REINSTALLED ORIGINAL POWER SUPPLY. REQUIRES FURTHER TROUBLESHOOTING. CANNOT DUPLICATE FAULT, OP CHECKED GOOD. OK TO CONTINUE.