As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCREPANCY: CDU SCREEN ON CA WENT BLANK. ABOUT 45 SECONDS LATER LEFT GEN LIGHT WENT OFF, THEN L GEN CAME BACK ON BY ITSELF. CORRECTIVE ACTION: REPLACED LEFT IDG IAW B767 AMM 24-11-01, LEAK AND OPS CHECKS GOOD. ETOPS GROUND VERIFICATION OK