We have just purchased a 05 massey ferguson 186 baler it in great condition. When we went to look at it the computer and baler was running great but since its arrived with us we cant get any power to the screen?!? dose any one have any ideas there is power via 2 pins to the computer on the baler but none back to the screen?
is there supposed to be two leads to the screen in the cab because as far as i can see there is only one but there is a plug for a second one?

Any advice would be appreciated