As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PUSH BACK GOT A STRONG ELECTRICAL ODOR IN THE COCKPIT. THE CAPT'S ND AND PFD STARTED TO FLASH ON AND OFF. ALSO, THE CAPT'S A/S, VSI AND ALT OFF FLAGS FLASHED ON AND OFF. EMERGENCY SWITCH ARCING DURING STANDBY PWR CK. REMOVED AND REPLACED SWITCH. PERFORMED CK OUT PER M/M 24-23-02-401 NORMAL PER CK OUT.