2007 rancher 420 won’t starr

I’ve been working on arcs and vehicles for a long time and I have an abundance of tools and knowledge at my disposal; however, I have finally come across a problems with my ol rancher that I cannot for the life of me figure out what’s wrong with it. Here goes it. My rancher has 20k plus miles on it and has never given me a lick of problems. Doesn’t tick knock or blow smoke and she’s been rode hard and put up wet and been sunk multiple times. I backed her off in a pond to ride a water wheelie and I did and everything was fine and dandy for the next few minutes then it just died. Lost all power to the display and neutral indicator started flashing and the little rectangular black plug in box started clicking really loud so I put a new one of those on it and it didn’t help any. And it wouldn’t turn over or anything. I pull it back to the house and try to jump it off, but nothing happened. I cross the solenoid and it turns over but will not fire off and it’s not getting spark. It’s getting fuel because I can smell it. What’s going on here? Computer fried? Bad ground? I’ve tried most everything.