As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RADAR SHOWS WHAT APPEARS TO BE GROUND RETURNS IN CLIMB AND CRUISE ON CAPTAINS DISPLAY.. F/O'S DISPLAY SHOWS NOTHING WITH THE SAME PARAMETERS SELECTED 160NM RANGE WXT AUTO TILT AND AUTO GAIN. GROUNDED - YES. REPLACED WEATHER RADAR R/T PER AMM 34-43-00-710-802-0014 ALL TEST PASS.