WE JUST BOUGHT A USED SPRAYER WITH A RAVENS 460 (28 CHARACTER DISPLAY) ALL WAS WELL UNTIL TODAY WHEN WE WENT TO USE IT THE SELF TEST BUTTON WAS LIT AND WON'T GO OUT. WE REALLY CAN'T DO ANY THING ELSE WITH IT. I'VE UN PLUGGED IT , TRIED TO RESET IT , TRIED EVERYTHING I CAN THINK OF . PLEASE HELP!
Raven 460 self test WON'T STOP HELP!
