As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO SJU DUE TO THE FLIGHT CREW REORTING THE WEATHER RADAR WILL NOT PAINT GROUND OR WEATHER RETURNS WITH NO FAULT MESSAGES DISPLAYED - THE AIRCRAFT LANDED SAFELY AT SJU WITHOUT FURTHER INCIDENT - MAINTENANCE RERACKED WEATHER RADAR RT AND ACCOMPLISHED VISUAL OF ANTENNA SWEEPING AND TILTING PER AMM 34-41-00