MX5400 won't crank

[w.reiche]

I have an 2022 MX5400 with about 200 hours on it. I'd been using it quite a bit over the weekend - bush hogging some fields and trails. I shut it off for a while this afternoon and when I went to restart it, it won't crank. It acts as though I'm trying to start it when its in gear. I'm aware of three sensors it uses - the seat, the range lever must be in neutral and the PTO must be turned off. Is there something else? How would one go about troubleshooting which sensor if that is the problem?

Thanks in advance.