As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN EMERGENCY POWER SWITCH TURNED ON, CAPTAIN'S PFD AND ND WENT BLANK AND REMAINED BLANK. REMOVED AND REPLACED NR 1 EFIS SYMBOL GENERATOR NO FIX. REMOVED AND REPLACED PFD NO FIX. REMOVED AND REPLACED EMERGENCY INVERTER OPERATION CHECKED GOOD.