As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START THE STANDBY POWER LIGHT ILLUMINATED CB F14 POPPED, RETURN TO GATE. FOUND P6 4 C/B POPPED. DC BUS INDICATION BATTERY. ACCOMPLISHED C/B RESET PROCEDURE, OP CK NORMAL, STBY PWR OP CK NORMAL. REF 20 60 01 860 801 24 34 00 710 802 24 21 53 400 801 AND WID 24 33 11.