As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RADAR DISPLAY ON CAPTAIN'S SIDE SHOWS GROUND CLUTTER AT CRUISE ALTITUDE WHEN IN THE AUTO MODE. GROUNDED - YES. FOUND 'GC' BUTTONS TO FUNCTION OPPOSITE OF EACH OTHER IN AUTO MODE. CONTROL PANEL S/N IS A PROBLEM ROTABLE. REPLACED WX RADAR CONTROL PANEL REF B737-800 AMM 34-43-91. DISPLAYS NOW MATCH AND 'GC' BUTTONS FUNCTION THE SAME.