As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE APU WAS POWERING THE ACFT WITH THE AVIONICS ON. THE LT AMLCD SCREEN WENT BLANK, THEN CAME BACK ON & THEN WENT BLANK FOR GOOD. A STRONG BURNING ODOR & A SMALL AMOUNT OF SMOKE WERE PRESENT. ALL ELECTRICAL POWER WAS REMOVED FROM THE ACFT. REMOVED AND REPLACED THE ENGINE AMLCD INDICATOR IAW MM 77-40-02. OPS CHECKED GOOD. INSPECTED CONNECTORS, WIRES & AROUND THE AREA FOR EVIDENCE OF BURNS . NO BURNS FOUND.