As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COOL CAUTION MESSAGE DISPLAYED SHORTLY AFTER T/O, RAN QRH PRECEDURE, MESSAGE PERSISTED, ED T-4 EACH DISLAYED OVERHEAT AND ALL MESSAGE EXTINGUISHED. ( ACFT DIVERTED -- EMERGENCY DECLARED AS A PRECAUTION) CONNECTED THE SUPPLY DUCT TO PLENUM WITH CLAMP IAW AMM-21-24-22 INSPECTED DISPLAY COOL FILTERS AND LOW FLOW DETECTOR IAW AMM-21-24-07 INSPECTED ALL CRT'S. CLEARED AND PERFORMED OPS TEST OF PFD'S MFD'S IAW AMM 34-25-00 NO DEFECTS NOTED.