Re: Case mx 135 problems!!!!
Had the exact same thing happen to my mx210 a copule of years back. I would loose pto, hyd, and couldnt change gears. My screen that displays the gears on the corner post would disappear. They call it a terminator. There is two of them on a tractor, one probally under the hood and one behind the cab. On the 210 I changed the one just above the starter and fixed it luckily. The one behind the cab is among all the computers on the back of the cab. Mine was a black box 2"x2"
It "terminates" the end of the computer wiring harness that lets all the computers communicate with each other. Cost me $40-50. make sure you get the newest ones. Dealer told me at that time they had changed them 230 times due to failures!!! Let me know if this helps.