As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INOPERATIVE. FOUND UNIT POWERS UP; BUT DISPLAY IS TOTALLY INOPERATIVE. REPLACED INTEGRATED CIRCUITS I401, I402 AND TRANSISTOR Q401. SOME SEGMENTS ARE NOW LIT, BUT MOST ARE INOPERATIVE. REPLACED INTEGRATED CIRCUITS I507 AND I508. NO HELP. REPLACED DIODECR404. REPAIRED PROBLEM. REPLACED DISPLAY DUE TO SOME SEGMENTS BEING WEAK. REPAIRED. APPLIED DOW CORNING #4 COMPOUND TO DISPLAY. BENCH CHECK GOOD.