As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WEATHER RADAR MULTI-SCAN FUNCTION INOP, NOTHING SEEMS TO HAPPEN WHEN "AUTO BUTTON PRESSED. MANUAL TILT OPERATES NORMALLY. GROUNDED - YES. PERFORMED WXR SYSTEM - OPERATIONAL TEST REF B737-900 AMM 34-43-00-710-802-001, TEST FAILS AT STEP D.(8). REMOVED AND REPLACED WEATHER RADAR CONTROL PANEL IAW AMM 34-43-91/401. INSTALLATION TEST SUCCESSFUL, WXR SYSTEM - OPERATIONAL TEST NOW PASSES.