As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COULD NOT GET GENERATOR ON #2 ENGINE ON-LINE AFTER ENGINE START. GROUNDED - YES. PERFORMED A #2 GCU BITE PER B737-800 FIM 24-21 TASK 801. FOUND IDG FAULT, AND RESET IT. STARTED #2 ENGINE AND HAD 0 VOLTS/AMPS. SHUTDOWN AND FOUND #2 GCU WITH IDG FAULT ILLUMINATED. REMOVED AND REPLACED #2 ENG IDG REF B737-800 AMM 24-11-11. OPS & LK CK'D GOOD.