As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS WEATHER RADAR WILL NOT PAINT VISIBLE PRECIPITATION. *S/D* FOUND A FAULT ON THE RADAR RT UNIT. PULLED UNIT AND FOUND DUST ON RACK CONNECTOR. CLEANED RACK CONNECTOR AND THEN REINSTALLED UNIT. PERFORMED GROUND OPERATIONAL CHECK AND VERIFIED SYSTEM OPERATION OK.