As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START, ALL CABIN EMERGENCY SIGNS AND LIGHTS WERE ILLUMINATED WITH THE EMER LIGHT SWITCH IN ARM POSITION. REPLACED DEFECTIVE NR 1 EMERGENCY POWER SUPPLY WITH CUSTOMER SUPPLIED "TESTED" POWER SUPPLY. REPLACED DEFECTIVE NR 2 EMERGENCY POWER SUPPLY WITH CUSTOMER SUPPLIED "TESTED" POWER SUPPLY. PERFORMED SUCCESSFUL OPERATIONAL CHECK. ALL REF AMM 33-52-01.