As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)ADVISORY LIGHT CONTROL BOX SHORTED OUT CAUSING A STRONG ELECTRICAL BURNING SMELL IN COCKPIT CAUTION LIGHTS SWITCHED FROM DIM TO BRIGHT ON THEIR OWN JUST PRIOR CREW COULD NOT SWITCH LIGHTS BACK TO DI M. ADVISORY LIGHT BOX PC BOARD 'B' FOUND BURNT.