As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RADAR AUTO MODE IS SUSPECT. NO RETURNS ARE DISPLAYED IN AUTO ALTHOUGH CUMULUS BUILDUPS ARE OBSERVED IN THE VICINITY. NO "A" OR "M" IS DISPLAYED NEAR THE TILT CODE ON THE NAV DISPLAY. MANUAL MODE SHOWS NORMAL WX RETURNS. ACFT GROUNDED. ON DEFERRAL.