I recently purchased a house and a JD F680 came with it. I’m not sure how old it is but it has 680 hours on it. It doesn’t look like it was taken care of very well. Anyway, I’ve mowed with it about 4 times now and usually have to attempt to crank it a few times before it starts. The most recent time, it wouldn’t even make a noise when I turned the key. I jumped it with my truck and ran it for about 5 minutes till I had to pee so I jumped off of it forgetting to disengage the blades so it shut off. Put everything back to the starting position and tried cranking it but again not even a sound. Tried jumping it with my truck again but still not even a sound. I bought a new batter and that did nothing. Tried some research and tried the solenoid and screwdriver trick but all that does is get something to start spinning. As you can tell I’m not familiar with this stuff so any ideas on what I could do next?