As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BENCH CHECK NEEDED. INSPECTED UNIT AND FOUND UNIT HAS NO TRANSMIT. FOUND OUTPUT OF MICROPROCESSOR I405 TO BE BAD. REPLACED INTEGRATED CIRCUITS I402 AND I406. REPLACED CAVITY OSCILLATOR V101. REPLACED BROKEN TRANSISTOR Q415 AND INSTALLED HEATSINKBEHIND TRANSISTOR Q415. REPLACED RESISTOR/CAPACITOR PACK RM401.