As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: WHEN EMERGENCY EXIT LIGHT SWITCH IS OFF, THE OFF LIGHT DOES NOT ILLUMINATE. MAINTENANCE FOUND BAD ANNUNCIATOR LIGHT INTERFACE BOARD 7LP PER TSM 33-51-00-810-816 AND REPLACED IT PER AMM 33-14-33. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.