As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN'S RADAR DOES NOT SEEM TO BE PAINTING THE WEATHER CORRECTLY IN AUTO MODE. BOTH THE MANUAL MODE ON THE CAPTAIN'S SIDE AND THE FO'S RADAR WORK NORMALLY. GROUNDED - YES. CONFIRMED FAULT, FOUND CAPT'S RECEIVER GAIN SET TO LOW. DUE TO HISTORY, REMOVED & REPLACED RADAR CONTROL PANEL REF AMM 34-43-91, OPS CK NML.