Craftsman Lt 2000 Won't Start?

I mowed the lawn with a Craftsman Lt 2000 and hit stump. Then it stalled. It started right back up and I finished mowing and turned it off. Now it won't start. I have turned the key and nothing happens...no sound, no movement. I replaced the solenoid, seat switch, and ignition switch. The fuse looks good. I'm stumped!