As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF, FIRST OFFICERS EHSI AND NAV NUMBER TWO WENT INOPERATIVE. RETURNED TO LAX. NORMAL POWER RETURNED TO BOTH UNITS AFTER LANDING. FOUND NUMBER TWO EMERGENCY BUS CIRCUIT BREAKER POPPED. RESET CIRCUIT BREAKER. RAN ENGINE AND ALL CHECKS GOOD.