As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTS THAT GPS TAKES 5-10 MINUTES TO CHANGE FUNCTIONS. PERFORMED PRELIMINARY INSPECTION. VERIFIED UNIT TAKES TOO LONG TO LOCK ON AND CRSR AND ENT BUTTONS INTERMITTENT AND NAV LED NOT WORKING. SENT TO GARMIN INTERNATIONAL FOR INSPECTION AND REPAIR.