I have a JD 4720 that cranks over but won't start. The last time it ran was two months ago and started just fine at that time. I've done a ton of research on this forum but haven't been able to figure it out. Most common problems have pointed to the solenoid or the thermistor. I tested every relay and checked all of the fuses and they're all ok. When I turn the key I can hear both the relay and the solenoid click. Many have suggested the thermistor so I pulled out the fuse box and took apart the wiring harness but I don't see anything remotely close to a thermistor. Could it be located elsewhere? Any other suggestions? I'm not an overly technical or mechanical guy but can figure things out fairly well if given a little guidance. Thanks.