As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN ARMING LIGHTS ON GROUND DURING BEFORE START FLOW, LIGHTS MOMENTARILY ILLUMINATE AND THEN EXTINGUISH PERFORMED FIM 33-50-00-810-801 AND FOUND THE BATTERIES NEEDED TO BE CHARGED. HOOKED UP AUX CART AND CHARGED BATTERIES FOR A HOUR. DISCONNECTED GPU AND OPS CHECK GOOD. ALL WORK WAS DONE IN REF TO EMB-505 AMM 33-52-01 THIS CLEARS AOG