As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WEATHER RADAR WILL NOT GO INTO AUTO MODE WHEN AUTO SELECTED. MANUAL MODE WORKS. GROUNDED - YES. VERIFIED DISCREPANCY. FOUND AUTO/MANUAL INTERMITTENT. REMOVED AND INSTALLED A NEW WEATHER RADAR CONTROL PANEL IAW AMM 34-43-91/401. PERFORMED SYS INSTALLATION TEST IAW AMM TASK 34-43-91-400-801. SYS OPS NORMAL.