What was found
WEATHER RADAR NOT INOP WX RADAR IS INOP, PER CREW COULD ONLY PAINT ONE STREAK OF PRECIP, FLYING INTO WEATHER AND HAD TO BE DIVERTED BY ATC. NOTHING ELSE SHOWING ON DISPLAY WITH WEATHER IN VICINITY. CREW PERFORMED MX WITH TOMC AND COULD NOT GET RADAR TO RESET. REMOVED AND REPLACED WEATHER RADAR TRANSCEIVER IN REF TO AMM 34-43-41. OPERATIONAL CHECK GOOD BUT DUE TO AIR RETURN, AS A PRECAUTIONARY, PERFORM SYSTEM TEST REF AMM 34-43-00-730-802-001 AND LOGPAGE 5216030.