As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT GATE INBD GOT VENT BLOWER FAULT. BLOWER FAN KICKED OFF AND THEN EICAS SHOWED AVIONICS SMOKE W/ACRID ELECTRICAL SMELL. RAN QRH AND THEN GEN1 LINE SMOKE LIGHT APPEARED QRH RAN AND GEN1 LINE DISCONNECTED; R&R VENT BLOWER FAN 20QH PER AMM 21-26-51. AEVC PER DUE NO TEST OF FANS PERFORMED OP TEST OF AEVC AND SMOKE. OPS TEST PASS.