As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DIVERTED DUE TO EQUIPMENT COOLING FAULT INDICATION. EQUIPMENT COOLING FAULT ON TAXI, ONCE CHECKLIST C-W AND ALTERNATE SELECTED EICAS CLEARED. NO CB'S FOUND POPPED ON FLIGHT DECK. COMPLIED WITH MEL CARD. REPLACED COOLING FAN FILTER.