As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3854 LGA TO SYR REPORTED WEATHER RADAR AS SPOKING INTERMITTANTLY AND NOT PAINTING THE WEATHER. CONDITION OCCURRED DURING CRUISE. CREW RETURNED TO LGA DUE TO SEVERE WEATHER EN ROUTE. MAINTENANCE REMOVED AND REPLACED THE WEATHER RADAR R/T AND ALL SYSTEMS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.