As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJC FLIGHT NR 2452: NR 1 DC GEN CAUTION LIGHT ILLUMINATED AFTER START. EXTERNAL POWER KICKED OFF DURING START. AIRCRAFT RETURNED TO BLOCK. MAINTENANCE POWERED A/C DOWN AND REPOWERED/RESTARTED GEN. ALL OPERATE NORMALLY AS PER MTX CONTROL. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.