As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE WORKING TC 78233001 FOUND MULTIPLE EXTERIOR AND MULTIPLE INTERIOR EMERGENCY LIGHTS OUT AFTER 15 MINUTE. GROUNDED - YES. REMOVED AND REPLACED M1675, M2335, AND M1695 ALL POWER SUPPLIES AND E LIGHTS TEST NORMAL REF AMM 33-51-06-960-806.