I was driving john deere 6320 premium and all of a sudden it lost power and stopped on the road. The dash went dead with only the time being displayed on the screen. Its starting ok and will rev up sometimes but sometimes it wont. When i put it in gear to drive, the shuttle will beep but it wont budge. I've checked all the fuses and substituted a new relay in for each off the relays but it made no difference. Any advice would be greatly appreciated.