As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FUNCTION CHECK FOR NAV COM RADIO, DISPLAY STARTED FLASHING AND ALSO CHANGING FREQUENCY DISPLAYED WITH NO OPERATOR INPUT. COULD NOT DUPLICATE PROBLEM. RESEATED MICROPROCESSOR AND CATHODE AND ANODE DRIVERS. CLEANED ALL PLUG CONNECTORS FOR ICS. ADJUSTED FREQUENCY AND SQUELCH FOR COMM. BENCH CHECK GOOD.