Have a 4310 e-hydro, the PTO will not engage. Was working fine most of the day, did some FEL work and went to engage PTO and the dash light comes on, seat safety switch will kill the tractor, but no PTO operation to the MX5. Help PLEASEEEEE. Am I looking for loose wires or loose connections under the tractor that could have gotten snagged by heavy brush etc. Please help, this is a rented unit and there is NO help this weekend. We already had to fix a flat tire when we rented it.