As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON SVC FOUND EMER LIGHTS OUT AT LT AFT OVERWING AND TWO EMER LIGHTS ON BULL NOSE AFT OF EXIT DOOR. FOUND POWER SUPPLY / BATTERY M11383 INOP. INSTALLED NEW POWER SUPPLY AND TEMP INSTALLED A GOOD BATTERY LIGHTS CHECKED GOOD. REMOVED BATTERY AND REINSTALLED IN ORIGINAL LOCATION. B757-AMM 33-51-07. INSTALLED NEW BATTERY. OPS CHECKED GOOD.